Response to the following problem:
As mentioned in the text, the C B amplifier functions as a current buffer. That is, when fed with a current signal, it passes it to the collector and supplies the output collector current at a high output resistance.
Figure shows a CB amplifier fed with a signal current isig having a source resistance Rsig = 10 kΩ. The BJT is specified to have β = 100 and VA = 50 V. (Note that the bias arrangement is not shown.) The output at the collector is represented by its Norton equivalent circuit.
Find the value of the current gain k and the output resistance Rout. Note that k is the short-circuit current gain and should be evaluated using the T model of the transistor with the collector short-circuited to ground.
