| 摘要 |
A voltage amplifier comprises an operational amplifier and two resistors, common point of connection thereof is connected to inverting input of the operational amplifier, a first resistor is connected to input of first input voltage, second input voltage is connected to noninverting input of the operational amplifier, a second resistor being feedback resistor. Moreover, a second operation amplifier is incorporated, inverting input of which is connected to output of the first operational amplifier, noninverting inputs of operational amplifiers are united; output of the said operational amplifier is connected to a second feedback resistor and serves as output of the voltage amplifier. |
