Q2. In the following Schmitt trigger oscillator +Vcc = +12 volt, - VEE= -8 volt a) Plot the transfer characteristic (vo versus Ve) b) Derive and calculate frequency of oscillation. c) Plot the waveforms of vo and Ve R= 20K +Vcc = +12 V - VEE-8V . A R2 = 30 k Ri= 10 k T 5000 pF Q3. a) Derive the maximum efficiency of class A power amplifier (when Vce=Vcc/2) b) Derive the efficiency of class A power amplifier (when VcE=Vcc/3) (Hint: Although you do not need amplifier component values, but you may use Vec =12 V and Re = 4 ohms) Q4. a) Discuss clearly and briefly: why Clapp oscillator frequency is more stable than Colpitts oscillator frequency? b) If 741 OPAMP is used in Wien-Bridge oscillator, what maximum frequency can be achieved? Justify your answer. Q2. In the following Schmitt trigger oscillator +Vcc = +12 volt, - VEE= -8 volt a) Plot the transfer characteristic (vo versus Ve) b) Derive and calculate frequency of oscillation. c) Plot the waveforms of vo and Ve R= 20K +Vcc = +12 V - VEE-8V . A R2 = 30 k Ri= 10 k T 5000 pF Q3. a) Derive the maximum efficiency of class A power amplifier (when Vce=Vcc/2) b) Derive the efficiency of class A power amplifier (when VcE=Vcc/3) (Hint: Although you do not need amplifier component values, but you may use Vec =12 V and Re = 4 ohms) Q4. a) Discuss clearly and briefly: why Clapp oscillator frequency is more stable than Colpitts oscillator frequency? b) If 741 OPAMP is used in Wien-Bridge oscillator, what maximum frequency can be achieved? Justify your