| 摘要 |
A multi-function voltage amplifier comprises an operational amplifier-based non-inverting amplifier, whose non-inverted input is the input of multi-function voltage amplifier. The inverting input of said amplifier is connected to a common bus by a resistor, by a resistor- to the output, which serves as the output of multi-function voltage amplifier; thereby, a first independent channel is formed. In addition, an inverting circuit includingandresistors and an auxiliary operational amplifier are introduced, whose output serves as the second output of auxiliary operational amplifier, by a resistor– to the second output of multi-function voltage amplifier. The non-inverting input of auxiliary amplifier is connected to the common point ofandresistors. The inverting input thereof is connected to the output of operational amplifier by theresistor, to the second output of multi-function voltage amplifier – by the resistor, an amplification constant is. |
