The operational amplifier has ()
A. high input impedance and high output impedance.
B. high input impedance and low output impedance.
C. low input impedance and high output impedance.
D. low input impedance and low output impedance.
查看答案
The operational amplifier has ()
A. low differential gain and low common gain.
B. low differential gain and high common gain.
C. high differential gain and high common gain.
D. high differential gain and low common gain.
The unit of measure for FET transconductance () is ().
A. Ohms per volt
B. Volts per ampere
C. Siemens
D. unitless
The common base amplifiers usually has（ ）
A. large input impedance and large output impedance.
B. small input impedance and large output impedance.
C. small input impedance and small output impedance.
D. large input impedance and small output impedance.
In the cascade system, ( )
A. the input impedance depends on the first stage and the output impedance depends on the last stage.
B. the input impedance depends on the first stage and the output impedance depends on the first stage.
C. the input impedance depends on the last stage and the output impedance depends on the last stage.
D. the input impedance depends on the last stage and the output impedance depends on the last stage.
微信支付 
支付宝支付