Being the mannered null circuit in order to design the input circuit and that kind of circuit for the transistor

摘要

Being the circuit, it possesses with the transistor 14 which is connected to the output of input adjustable network and input adjustable network, input adjustable network 12 when the input signal which possesses the power level where the said input adjustable network 12 is low relatively being supplied, has 1st input impedance, when the input signal which possesses the power level where the said input adjustable network 12 is high relatively being supplied, 1st input impedance possesses the input impedance which differs, the circuit. Selective figure Figure 1