16. Sketch the root locus for a unity-feedback system where Then find the following: [Section: 8.5] G (s) = K (8-2) (8-3) s(s+2) (8+3) a. The breakaway and break-in points b. The crossing of the jo-axis c. The range of K for closed-loop stability d. The value of K that will result in a stable system with complex conjugate poles and damping factor of 0.5

(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…

Given the feedback circuit below and assuming the voltage amplifier has gain A₂, input resistance R₁ and output resistance Ro, answer the following questions: + a. Loop gain b. Closed loop gain Re C. Input resistance d. Output resistance Rin м + RE A) Sketch the feedback small signal model of this circuit. (Hint: You may convert the input VIN and source resistance Rs to its Norton current equivalent if needed) B) Find the following in terms of the amplifier parameters and resistances R, and RF: Rout

The figure below shows a block diagram with multiple nested feedback loops which needs to be analyzed the functions Fi shown in the blocks are simplified representations of Fi(s).  (a) determine a canonical feedback configuration with one feedforward and one feedback path,   (b) determine the overall transfer function Y(s)/X(s). The individual steps are to be explained by redrawing necessary figures. Show your solution steps.

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Signals and Systems Only 12.

Which op-amp network is commonly used to reduce the effect of noise on comparator circuits (Schmitt trigger arrangement)?Using an output networkUsing a negative feedback networkUsing an input networkUsing a positive feedback network

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please do question 2 and 3

Q-4. How many op-amps are required to implement this equation? V1+ R2 V. =- A) 3 B) 4 C) 2 D) 1 Q- 5. For the following feedback circuit. Identify the type of feedback and find the closed loop gain. E A ► VOUT