For the given amplifier circuit, find the input cut-off frequency. FET parameters are gm = 4 mA/V, Cgs = 4 pf, rds = 40 kΩ, Cgd = 2 pF.

For the given amplifier circuit, find the input cut-off frequency. FET

1.	For the given amplifier circuit, find the input cut-off frequency. FET parameters are gm = 4 mA/V, Cgs = 4 pf, rds = 40 kΩ, Cgd = 2 pF.
A.	35.5 MHz
B.	45.5 MHz
C.	90.5 MHz
D.	10.5 MHz
Answer» C. 90.5 MHz