The components in the circuit shown below are ideal. If the op-amp is in positive feedback and the input voltage V, is a sine wave of amplitude 1 V, the output voltage V, is 1 k2 ww- +5 V 1 V 1 k2 Vo WW -1 V -5 V (a) a square wave of 5 V amplitude (b) an inverted sine wave of 1 V amplitude (c) a non-inverted sine wave of 2 V amplitude (d) a constant of either +5 or -5 V

3. In an ideal op-amp, which is not true? a) Open loop voltage gain is infinite b) Input resistance is infinite c) Slew rate is infinite d) CMRR is zero

Figure 3 shows a Hartley oscillator. Assume that the op-amp employed in the figure is an ideal op-amp, and R1= 20 kΩ, R2 = 60 kΩ, L1=10 mH.  b) State the Barkhausen criterion for sustained oscillation.c) Explain briefly how the phase shift requirement for sustained oscillation ismet in the circuit of Figure 3.d) The feedback ratio and oscillation frequency of Figure 3 are givenrespectively by, B = -L2/L1 and w0 = 1 / sqrt(L1 +L2)C Determine the values of C and L2 in order for the circuit to oscillate at a frequency of 200 Hz.

If in the oscillator block diagram shown in Figure, = 0.1V, A = 100 and m = 0.01, then the circuit will. V₁ mVo Voltage Gain A Feedback Circuit V