Dual portable power supply for operational amplifier, its output can be on both sides of the zero-voltage changes in the zero differential input voltage can also be output nulling. Single portable power supply operational amplifier, the output power with a range between changes.
Opamp input potential usually require a certain value higher than the negative supply, while the power is lower than a certain value. Specially designed to allow the op amp input potential from negative to positive power supply of the entire range of changes, even slightly above or slightly below is a negative portable power supply has been allowed. Such as op amp rail-to-rail input op-amp.
The output signal of operational amplifier with two input voltage difference is directly proportional to the signal in the audio segment are: output voltage A0which, A0 is the low-frequency operational amplifier open-loop gain , E1 is the same side of the input signal voltage, E2 is the RP side of the input signal voltage.
Integrated operational amplifier in accordance with the parameters of the points, integrated op-amp can be divided into the following categories.
General-purpose operational amplifier
General-purpose op amp is for the purpose of universal design. The main features of these devices are cheap and widely Large product capacity, performance indicators suitable for general use. |
