I need to make a BJT voltage amplifier that gives me a gain of 25 (either in phase or out of phase). My restrictions are as follows:
-Transistor: 2N2222 with a \(\beta\) of 150
-Transistor power dissipation is less than 50 mW
-Resistor only biasing
-single DC power supply
-Resistors have to be less than 500 kilo ohms
-Coupling and bypass capacitors are "large" (1 mF)
-Load resistance is 16.81 kilo ohms
I started off with a really simple design, that I think would work except that it has me using a resistor that is about 4 ohms, which makes no practical sense. Assume that the input AC signal is a "small" signal, and the small signal model can be approximated with the hybrid-\(\pi\) model
See attached diagram:
-Transistor: 2N2222 with a \(\beta\) of 150
-Transistor power dissipation is less than 50 mW
-Resistor only biasing
-single DC power supply
-Resistors have to be less than 500 kilo ohms
-Coupling and bypass capacitors are "large" (1 mF)
-Load resistance is 16.81 kilo ohms
I started off with a really simple design, that I think would work except that it has me using a resistor that is about 4 ohms, which makes no practical sense. Assume that the input AC signal is a "small" signal, and the small signal model can be approximated with the hybrid-\(\pi\) model
See attached diagram:
Attachments
-
14.3 KB Views: 54