Can a single power supply op amp only output positive pressure? How can you get a negative pressure?
The picture shows an inverting 1 to 1 circuit. The single-power supply op amp can only output positive voltage. If the dual power supply is used, the wave will be normal.
Mariah 發表於 July 1, 2020
It is necessary to output a negative voltage from a single power supply, then choose an op amp powered by a negative power supply.
Lewis 發表於 July 1, 2020
This is how op amps are used.
The first way:
The input is a positive and negative signal, and the output is a positive and negative signal. Indeed, a negative power supply is required for the op amp.
For example, input -1 to 1V, output -5 to 5V
The second way:
If you need to use a single-supply op amp, you add an offset. The idea is
Input -1 to 1V, output 0-5V. In this way, a single power supply can be used.
Andrea 發表於 July 1, 2020
If it is determined that a negative signal is required, it must work with dual power sources before it can output a normal complete signal.
