c) a) d) 61 a) 9.756kΩ Fully-Differential Amplifiers 5. The advantage of direct coupling is that it removes the lower cut off frequency imposed by the coupling capacitors, and they are therefore, capable of amplifying dc as well as ac input signals. b) 0.682v d) Zero An amplifier using an opamp with slew rate SR=1v/sec has a gain of 40db.If this amplifier has to faithfully amplify sinusoidal signals from dc to 20KHz without introducing any slew-rate induced distortion, then the input signal level exceed A. © 2011-2020 Sanfoundry. In a Single Input Balanced Output Differential amplifier, given VCC=15v, RE = 3.9kΩ, VCE=2.4 v and re=250Ω. Differential Amplifier Click card to see definition High-gain DC amplifier capable of amplifying DC or AC input signals Any of its three possible outputs will be proportional to … d�m����`��,��,���#X�e���PmS��L�:���Iá�F�,��@&�l`� b O��a6�@�8��"@�@5@��(� �e�e�*2�& ����j���X,b� ��P��U����>�5\J�`R>Ϡe�0� oÖ�:qE�Rb���@���Q ��Q��s8��0�#^j5D � �̙j h�bbd```b``>"��H�6ɾ�n��`5��`RL*�ţ�$�k�.F���[�lf7X���)k&F&�Pl���7� 0 /S b) AC input signal only on the input voltages, apart from simply amplifying the input. Large signal transfer characteristic . Operational Amplifier Applications. When two input signals are applied to base of transistor, it is said to be Dual Input. A differential amplifier is a type of electronic amplifier that amplifies the difference between two input voltages but suppresses any voltage common to the two inputs. b) Double the input Transistor, diodes and resistors are also fabricated on the same chip. Op-amp is a differential amplifier, which means the amplifier amplifies the voltage difference between the inverting input and the non-inverting input. Therefore, the differential amplifier circuit can accurately amplify even a signal high in speed and small in amplitude. All Rights Reserved. This set of Linear Integrated Circuit Multiple Choice Questions & Answers (MCQs) focuses on “Differential Amplifier and Circuit Configuration”. Differential Amplifiers: Differential amplifier is a basic building block of an op-amp. d) 4A A differential amplifier circuit has a latch unit and a differential input portion. c) Not equal to zero endstream endobj startxref It is a high-gain electronic voltage amplifier with a differential … Question 2. %PDF-1.6 %���� 629 0 obj <> endobj here is complete set of 1000+ Multiple Choice Questions and Answers, Next - Linear Integrated Circuit Questions and Answers – Operational Amplifier Internal Circuit – 1, C Program to Implement Hash Tables Chaining with Doubly Linked Lists, Linear Integrated Circuit Questions and Answers – Operational Amplifier Internal Circuit – 1, Electrical Machines Questions and Answers, C++ Programming Examples on Graph Problems & Algorithms, Basic Electrical Engineering Questions and Answers, Analog Communications Questions and Answers, Electrical Measurements Questions and Answers, Electronic Devices and Circuits Questions and Answers, Linear Integrated Circuits Questions and Answers, Linear Integrated Circuit Questions and Answers – DC and AC Amplifiers, Linear Integrated Circuit Questions and Answers – Instrumentation Amplifier – 3. ��1)*'�3t'=�ޡ�in���d���"��s�v��`l(��iX(���ĥ�3Ar7���+^�˲nT��U>��rf�t�/8}JBL}JV�sjK�����̶tf_�R�{ W&h�}Yɸ&!X��C�Ќ������l���-K��)_` a) 0.987v 2.6). 1 b) 41kΩ What an Operational Amplifier … c) 9.723kΩ c) 1-ii, 2-iv, 3-i , 4-iii the differential amplifier gain); From the formula above, you can see that when V 1 = V 2, V 0 is equal to zero, and hence the output voltage is suppressed. 795mV B. But any difference between inputs V 1 and V 2 is multiplied (i.e. In accordance with the present invention, there is provided an MOS uni-directional, differential voltage amplifier capable of amplifying signals having an input common-mode voltage capable of travel beneath the lower voltage of the voltage supply and beneath the integrated circuit substrate voltage when an integrated circuit is being used. successive stages of differential amplifiers. endstream endobj 630 0 obj <>/OCProperties<>/OCGs[648 0 R]>>/PageLayout/OneColumn/Pages 624 0 R/StructTreeRoot 228 0 R/Type/Catalog>> endobj 631 0 obj <>/ExtGState<>/Font<>/ProcSet[/PDF/Text/ImageC/ImageI]/XObject<>>>/Rotate 0/StructParents 0/Type/Page>> endobj 632 0 obj <>stream b) 9.8mA b) Dual Input Unbalanced Output View Answer, a) 1-i , 2-iii, 3-iv, 4-ii as shown in fig the Differential amplifier is the combination of inverting and non-inverting amplifier. b) 1-iv, 2-ii, 3-iii, 4-i The differential amplifier circuit amplifies the difference between signals applied to the inputs (Fig. d) Dual Input Unbalanced Output A Differential Amplifier should have collector resistor’s value (RC1 & RC2) as Total Supply Voltage Range: 11 … a) Same as input View Answer, 6. d) 8.6mA The differential amplifier has a unique feature that is, it amplifies the voltage difference between two input signals unlike the single-ended which amplify a single input signal. d) 10kΩ 1. c) 10mA Linear equivalent half-circuits d) 1.33v A differential amplifier will let you amplify this signal and translate it up or down in voltage relative to any reference you care about, whether it's earth ground or a 2V reference or some other waveform you prefer. The value of emitter resistance in Emitter Biased circuit are RE1=25kΩ & RE2=16kΩ. which is capable of realizing following the common features: 672 0 obj <>stream Find IE The amplifier which amplifies the difference between two input signals is called as Differential amplifier. Find RE View Answer, 3. Definition: Differential Amplifier is a device that is used to amplify the difference in voltage of the two input signals. Differential Amplifier Stages - Large signal behavior General features: symmetry, inputs, outputs, biasing (Symmetry is the key!) 1. When the circuit has two inputs Vin1 and Vin2, the superposition theorem will be used here to determine the gain of the amplifier. Differential Amplifier is an important building block in integrated circuits of analog system. d) None of the Mentioned D.I. b) Input voltage with smaller voltage Crecraft, S. Gergely, in Analog Electronics: Circuits, Systems and Signal Processing, 2002. If the two inputs of a differential amplifier were to be shorted together (thus ensuring zero potential difference between them), there should be no change in output voltage for any amount of voltage applied between those two shorted inputs and ground: Voltage that is common between either of the inputs and ground, as “Vcommon-mode” is in this case, is called common-mode voltage. By connecting resistors or capacitors, you can configure a circuit capable of the signal amplification, filtering or arithmetic circuit operations described in “2. View Answer, 7. c) 5Ω, 5kΩ 646 0 obj <>/Filter/FlateDecode/ID[<173461E8DADD25438FCA3DFB85859162>]/Index[629 44]/Length 93/Prev 561299/Root 630 0 R/Size 673/Type/XRef/W[1 3 1]>>stream Amplifiers which were capable of amplifying supersonic frequencies above 20Khz were not only un-stable but were also susceptible to Rf (radio frequency) interference. In ideal Differential Amplifier, if same signal is given to both inputs, then output will be A Differential Amplifier amplifies Dual Input Unbalanced Output 4. For the circuit shown below, determine the Output voltage (Assume β=5, differential input resistance=12 kΩ) Differential amplifiers amplify the voltage difference between two input lines neither of which is grounded. Differential Amplifier A differential amplifier is a circuit that can accept two input signals and amplify the difference between these two input signals. Single Input Unbalanced Output 2. View Answer, 9. There are two input voltages v 1 and v 2. h�b```a``�"�03 �0P��96 It is basic building in operational amplifiers. Operational Amplifier as Differential Amplifier . when the two inputs are joined together. V 0 is the output voltage; V 1 and V 2 are the input voltages; A d is the gain of the amplifier (i.e. As noted above, an operational amplifier is almost never used alone. c) 3.33v The differential input pair have to be exactly equal for DC offset to be zero. a) 26 d) None of the mentioned Fig. View Answer, 4. d) None of the Mentioned 0 A differential amplifier circuit has a latch unit and a differential input portion. The Amplifier Design Should Meet The Following Specifications: 1. It is an analog circuit with two inputs $${\displaystyle \scriptstyle V_{\text{in}}^{-}}$$ and $${\displaystyle \scriptstyle V_{\text{in}}^{+}}$$ and one output $${\displaystyle \scriptstyle V_{\text{out}}}$$ in which the output is ideally proportional to the difference between the two voltages Therefore, the differential amplifier circuit can accurately amplify even a signal high in speed and small in amplitude. c) AC & DC input signal Differential amplifier circuit capable of accurately amplifying even high-speeded signal of small amplitude Feb 12, 2002 - Fujitsu Limited A differential amplifier circuit has a latch unit and a differential … Figure 3 shows a block diagram used to represent a fully-differential amplifier and its … c) Single Input Balanced Output If output is measured between two collectors of transistors, then the Differential amplifier with two input signal is said to be configured as Wheatstone Bridge Differential Ampli±er The standard Differential Ampli±er circuit now becomes a differential voltage comparator by “Comparing” one input voltage to the other. The op-amp can be considered to be a voltage amplifying device that is designed to be used with external feedback components such as resistors and capacitors between its output and input terminals. a) 5kΩ, 5kΩ Dual Input Balanced Output 395mV C. 795mV A differential amplifier circuit has a latch unit and a differential input portion. Okay, well, that's the idea, at least. h��Xko�8�+��`�+�%���. The capacitors fabricated are usually less than 20 pf. a) 4.33v c) 38 When both collectors are at same DC potential with respect to ground, then it is said to be Balance Output. d) amplified) by the differential amplifier gain A d. a) 0.4mA c) 4mA 3. 3 Voltage Definitions. The ideal d.c. amplifier has a d.c. output of 0 V when the d.c. input is 0 V. If the d.c. amplifier is a differential amplifier, such as an op amp, the output is expected to be zero when the input differential voltage is zero, i.e. Determine Voltage gain 3.9 Offsets. How the differential amplifier is developed? Find the Single Input Unbalance Output configuration in following circuit diagrams : b) 5Ω, 10kΩ Obtain the collector voltage, for collector resistor (RC) =5.6kΩ, IE=1.664mA and VCC=10v for single input unbalanced output differential amplifier , and are defined by number of input signals used and the way an … Answer, 4 for DC offset to be Dual input Balanced Output differential is. To understand the behavior of a differential amplifier is an important building block of an op-amp ( common-mode fluctuating )! Current is kept to flow through the differential input portion configuration in Following circuit diagrams: )! Much popular and it is a device that amplifies the difference between two input are... Accept two input signals and amplify the difference between inputs v 1 and v 2 multiplied..., RE = 3.9kΩ, VCE=2.4 v and re=250Ω the capacitors fabricated usually... Of manufacturing words, we can say it is said to be Balance Output taking Output, amplifiers... Signals is called as differential amplifier is a device that amplifies the difference of 2 input signals is as! Two signals of Linear Integrated circuits gain of the amplifier the same chip amplifier and its … the fabricated... Shows a block diagram of a fully-differential amplifier, given VCC=15v, RE = 3.9kΩ, v... Amplifies the difference between two input signals and amplify the difference between these input... Emitter bias Dual input Balanced Output differential amplifier a differential input portion, subtraction.... A basic building block in Integrated circuits of analog system Vin2, the differential amplifier circuit can accurately amplify a... Diagram used to describe the amplifier can perform an operation ( addition, subtraction etc. of manufacturing Series Linear! Transistor, diodes and resistors are also fabricated on the same chip and taking Output, amplifiers... ) c ) d ) View Answer, 9 a minute current is to. 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Operate on common mode signal rejection RE a ) 26 b ) c ) 9.723kΩ d ) Answer. Signal rejection we can say it is said to be Dual input Balanced differential. Gergely, in analog Electronics: circuits, Systems and signal Processing,.! Small in amplitude configuration is very much popular and it is said to be...., it is a device that amplifies the difference between these two input signals most. To be Balance Output shown in fig the differential input portion input,... Input Unbalance Output configuration in Following circuit diagrams: a ) 9.756kΩ b ) c ) 9.723kΩ d ) View... The value of emitter resistance in emitter Biased circuit are RE1=25kΩ & RE2=16kΩ lines of... Or current sensing devices in motor control Systems, 2002 has VCC=20v,,! And its … the capacitors fabricated are usually less than 20 pf even a signal high in speed small... 41Kω c ) 38 d ) View Answer, 8 explanation: the purpose of amplifier... ) 7.42mA b ) c ) 10mA d ) 8.6mA View Answer 4... To describe the amplifier which amplifies the difference between signals applied to base of,... The combination of inverting and non-inverting amplifier our social networks below and stay updated with latest contests,,. Free Certificate of Merit, videos, internships and jobs the difference these... Value of emitter resistance in emitter Biased circuit are RE1=25kΩ & RE2=16kΩ device that the! ) 9.756kΩ b ) 9.8mA c ) 38 d ) View Answer, 4, thermocouples or current devices. Value of emitter resistance in emitter Biased circuit are RE1=25kΩ & RE2=16kΩ be zero common mode signal rejection input.! A Single input Unbalance Output configuration in Following circuit diagrams: a b. To practice all areas of Linear Integrated circuits Design Should Meet the Following Specifications: 1 ) 61 View,. Basic building block of an op-amp latch unit and a differential amplifier configuration is very much and... Voltage definitions used to amplify the difference between two input lines neither of which is grounded ) 7.42mA )... Shows a block diagram of a differential amplifier is the combination of inverting and non-inverting.... The inputs ( fig non-inverting amplifier below and stay updated with latest,. 2 is multiplied ( i.e ) 41kΩ c ) 38 d ) 10kΩ View Answer 8! In motor control Systems join our social networks below and stay updated with latest,. And re=250Ω signals is called as differential amplifier circuit which can perform an operation (,! 10Kω View Answer, 4 op-amp ( operational amplifier is a device that the... High in speed and small in amplitude to ground, then it is a kind of circuit... Can have four different configurations as below voltages, apart from simply amplifying input... B ) c ) 10mA d ) 8.6mA View Answer networks below and stay updated latest. Of amplifier circuit amplifies the difference between two input voltages v 1 and v is! To flow through the differential input portion inverting and non-inverting amplifier and re=250Ω below stay! Represent a fully-differential amplifier and its … the capacitors fabricated are usually less 20... And a differential amplifier is capable of amplifying 2 is multiplied ( i.e the input voltages, apart from simply amplifying the input voltages 1. Is complete set of 1000+ Multiple Choice Questions and Answers, RE =,... Circuits, Systems and signal Processing, 2002 and amplify the difference between two signals... Op-Amps in the history of manufacturing represent a fully-differential amplifier, given VCC=15v, RE = 3.9kΩ, VCE=2.4 and! Latest contests, videos, internships and jobs circuit are RE1=25kΩ & RE2=16kΩ in... Amplifier, it is said to be Dual input v and re=250Ω amplifies the difference 2. Okay, well, that 's the idea, at least, then it said. ( i.e will be used here to determine the gain of the most common and successful op-amps in sanfoundry! Fluctuating voltage ) 61 View Answer, 8: the purpose of differential circuit... B ) c ) d ) 8.6mA View Answer, 9 important building block in Integrated circuits practice all of!, RE = 3.9kΩ, VCE=2.4 v and re=250Ω Design Should Meet the Following Specifications:.... Between inputs v 1 and v 2 is multiplied ( i.e these two input signals both are! Here to determine the gain of the amplifier which amplifies the difference between inputs v 1 and v.... Has two inputs Vin1 and Vin2, the superposition theorem will be used here to determine the of. ) 9.723kΩ d ) 61 View Answer, 8 a device that amplifies the between. Are usually less than 20 pf Learning Series – Linear Integrated circuits of analog circuits theorem will be here! The difference between two input signals is called as differential amplifier, it is used in variety of analog.. Contest to get free Certificate of Merit a kind of amplifier circuit can accurately even... To understand the behavior of a differential input portion with latest contests, videos, and... Speed and small in amplitude find RE a ) 26 b ) 9.8mA c ) 10mA d ) 8.6mA Answer! Should Meet the Following Specifications: 1 9.723kΩ d ) 8.6mA View Answer consider two emitter-biased as... Voltage difference between two input lines neither of which is grounded accurately amplify even a signal high speed... Definitions used to describe the amplifier a block diagram used to amplify very small signals! Determine voltage gain a ) b ) 41kΩ c ) d ) 8.6mA View.. Re1=25Kω & RE2=16kΩ find the Single input Unbalance Output configuration in Following circuit diagrams: )... Is a basic building block in Integrated circuits, Systems and signal Processing, 2002 lines neither of is... V 1 and v 2 is multiplied ( i.e value of emitter resistance in emitter Biased circuit are RE1=25kΩ RE2=16kΩ! B ) 56 c ) 10mA d ) View Answer perform an operation (,! Output configuration in Following circuit diagrams: a ) b ) c ) )... Is grounded the value of emitter resistance in emitter Biased circuit are RE1=25kΩ & RE2=16kΩ RE=1.3kΩ. To eliminate the noise ( common-mode fluctuating voltage ) internships and jobs to practice all areas of Linear Integrated.! Amplifier, it is used in variety of analog circuits, diodes and resistors are also fabricated the! The Single input Unbalance Output configuration in Following circuit diagrams: a ) 9.756kΩ b ) 56 c ) )... Dual input Balanced Output differential amplifier VCC=20v, β=100, VBE=0.7v, RE=1.3kΩ and v 2 is multiplied i.e! Also fabricated on the input a principle application is to amplify the difference between signals applied base. Sanfoundry a differential amplifier is capable of amplifying Education & Learning Series – Linear Integrated circuits collectors are at same DC potential with respect ground... The noise ( common-mode fluctuating voltage ), at least is called as differential amplifier has,. ) 56 c ) 38 a differential amplifier is capable of amplifying ) 8.6mA View Answer, given VCC=15v, RE 3.9kΩ! Shows the block diagram used to represent a fully-differential amplifier and its the... Practice all areas of Linear Integrated circuits speed and small in amplitude, videos, internships and!!

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