For the ideal operational amplifier circuit in Figure 1 whic

For the ideal operational amplifier circuit in Figure 1, which of the following are true? i_n = 0 v_p/i_p =0 v_0 lessthanorequalto V_CC i_p = i_n Question 2 Consider the circuit in Figure 2. Suppose the input voltage V_in = 1mV. Which of the following statements are true? I_in = 0 I_out = 0 V_out = 3V Op-amp buffer used to increase the voltage from the source to the load Op-amp buffer used to transfer more power from the source to the load Question 3 For the inverting operational amplifier in Figure 3, if R_in = 2k ohm and the closed-loop gain is to be G = -40. what is the appropriate value that should be chosen for the resistor R_f? Question 4 For the circuit in Figure 4: (a) Find the Thevenin equivalent voltage and resistance at terminals a-b. (b) Using the equivalent circuit of part (a) evaluate the voltage gain A_v = V_out/v_in (c) Find the input impedance, R_in. Question 5 For the circuit shown in Figure 5. assume that alpha = 0.99, and calculate: (a) the voltage gain A_v = v_out/v_in (b) the input impedance. R_in (c) the output impedance. R_out

Solution

Question 1 ) Ans

i_n=0 true because infinite impedance

v_o<=Vcc true output voltage is limited to Vcc

i_p=i_n=0 true

the other state ment is false because Vp/ip=infinite

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