(a) For a negative feedback system shown in Figure Q5(a), the input and output to the system is denoted as R(s) and Y(s) respectively. Derive the transfer function for the system. R(s) Y(s) E(s) G(s) B(s) H(s) Figure Q5(a)
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- What is an A/D converter with Voltage-to-Frequency Conversion (VFC)? What is the working principle?seels e A unity feedback system has G(s) as shown below in figure, what is the range K for * ?stability K(1+0.25)(1 +0.0255) () = 51+ 0.001 ) + 0,005 5) 6002. b) (i) Derive an expression for the differentiator using op-amp. (ii) Design a circuit to perform differentiation of an input signal that varies in frequency from 20HZ to about 2 KHz. (iii) If a sine wave of 0.5 V peak at 2 KHz is applied to the differentiator of part (ii), draw the output waveform.
- One advantage of having feedback in op amp circuit is A.Can control gain B.less complicated C.less input signal D.low gain E.high output voltage F.low bandwidth1) What is the difference between feedback and feedback circuit. 2) Draw a block diagram of op amp.these Questions from ELECTRONICS LAB ,The name of Experement is Op-Amp slew Rate.
- (A) For a 5 input resistive divider ('0-0V, 1'-+15V) find i) The full-scale output voltage. ii) The output voltage change due to the LSB. iii) The analog output voltage for a digital input of 01011. (B) Design 3 bit feedback amplifier DAC.1- Mention any two advantages of Integrated Circuit . 2- For the circuit given below : Vin is a sine wave Vinpp=6 V and Vref=-2.4 V , Assume Vsat=±12V Name the circuit and draw the input and output waveforms . Vin Vref 3- Explain why open-loop op-amp configurations are not used in linear applications? Draw the block diagram of opamp and define the function of each blockAn op-amp comparator in a firing circuit can produce waveforms at the output of up to 28 V peak-to-peak without any distortion. An inverse cosine-based firing circuit with a voltage range from +14 to -14 (reference voltage) is used to produce a gating signal for the SCR at the desired delay angle. if the reference voltage is 5.92 volts, the delay angle (in degrees) would be: O A. -155 O B. None of the other choices are correct O C. 155 O D.-25 O E. 65
- Ques 2: What is the Voltage series feedback? Explain the effect of feedback on gain and input, outputimpedanceWhen the unit step function is applied to the system input given below, the output response is as in figure-b.is happening. K and a seen in the open loop transfer function are constant numbers. Calculate the settling time of the system.(a) Identify the correct answers 1. Virtual ground of an OP-AMP (a) Is formed only with negative feedback (b) Is always an AC ground, may occasionally be a DC ground (for PMOS) (c) Is coined as a terminology where the input signal splits equally between the terminals (d) Leads to the concept of almost zero difference between the two inputs (both DC and AC) using feedback 2. In an OP-AMP based circuit (a) Phase margin of the closed loop transfer function is a measure of stable operation (b) 45° is a desirable phase margin as it balances the frequency domain stability and the time domain settling optimally (c) Absolute open loop gain numbers are not that important, as long as they are large (d) 45° is only achieved when the RHP zero is placed on one of the poles 3. In a differential amplifier biased with a given tail current I, to increase the overdrive voltage by 2X without changing input capacitive loading, we should (a) Increase W by 2X and reduce L by 2X (b) Reduce W by 2X and…