Analog Circuits Practice Test 5

1. Due to the Collector feedback mechanism, the transistor remains always remains in the __________

2. Find net voltage gain, given h_fe = 50 and h_ie = 1kΩ.

3. During high frequency applications of a B.J.T., which parasitic capacitors arise between the collector and the emitter?

4. Which parasitic capacitors don’t affect the frequency response of the C.C. stage of the B.J.T.?

5. A voltage amplifier has a voltage gain of 100. What will be gain at 3dB cut-off frequencies?

6. The transconductance of a B.J.T.is 5mS (g_m) while a 2KΩ (R_l) load resistance is connected to the C.E. stage. Neglecting the Early effect, what is the Miller multiplication factor for the input side?

7. Given that capacitance w.r.t the input node is 2pF and output node is 4pF, find capacitance between input and output node.

8. Which of the following is not true regarding the output capacitor in the transistor biasing circuit?

9. If 1/h₁₂ = 10 for a C.E. stage, what is the value of the base to collector capacitance, after Miller multiplication, at the output side?

10. Consider the circuit shown.

h_fe = 50, h_ie = 1000Ω. Find magnitude of voltage gain at input frequency 10Hz.