Exercise 3.3 Biasing a crappy FM transmitter circuit


An answer:

V CE = V CC − V RC = V CC − IC ⋅ RC IC = βfeIB IB = V CC − V B RB1 V CE = V CC − βfe V CC − V B RB1 RC

yields:

IC = 0.84mA…6.7mA RC = 1kΩ

and hence gives

V RC = 0.84…6.7V V CE = 8.16…2.3V

which is fine for biasing purposes.