Problems:
1. In the circuit of Figure, the BJT is biased with a constant-current source, and vsig is a small sine-wave signal. Find Rin and the gain vo/vsig. Assume β=100. If the amplitude of the signal vbe is to be limited to 5 mV, what is the largest signal at the input? What is the corresponding signal at the output?
2. The BJT in the circuit of Fig. P7.132 has β=100.
(a) Find the dc collector current and the dc voltage at the collector.
(b) Replacing the transistor by its T model, draw the small-signal equivalent circuit of the amplifier.
Analyze the resulting circuit to determine the voltage gain vo/vi
