What are the characteristics of integrated operational amplifiers working in the nonlinear region?

#What are the characteristics of integrated operational amplifiers working in the nonlinear region?

1. Characteristics of the integrated operational amplifier working in the linear region:

(1) virtual short: when the integrated operational amplifier works in the linear region When , the voltages at the non-inverting terminal and the inverting terminal are almost equal, so it is called a false short circuit, or virtual short circuit for short.

(2) Virtual open: When the integrated operational amplifier works in the linear region, the current flowing into the non-inverting terminal and the inverting terminal is almost zero, so it is called a false open circuit, or virtual open for short.

2. Characteristics of the integrated operational amplifier working in the nonlinear region:

When the non-inverting terminal voltage is greater than the inverting terminal voltage, that is, when U is greater than U-, Uo is equal to Uom; when the non-inverting terminal voltage is less than the inverting terminal voltage, that is, when U is less than U-, Uo is equal to -Uom.

Extended information:

(1) The most basic application circuit of the integrated operational amplifier working in the linear working state can be divided into inverting proportional operation circuit and non-phase Proportional arithmetic circuit.

(2) Integrated operational amplifier

Integrated operational amplifier is referred to as integrated operational amplifier. Its interior is a directly coupled multi-stage amplifier. The entire circuit can be divided into input stage, intermediate stage and output stage. three parts.

The input stage uses a differential amplifier circuit to eliminate zero drift and suppress interference; the intermediate stage generally uses a common emitter circuit to obtain a sufficiently high voltage gain;

The output stage generally uses a complementary symmetrical power amplifier circuit to output sufficient voltage and current, with small output resistance and strong load capacity.

Integrated operational amplifiers generally consist of four parts: input terminal, output terminal, bias circuit and intermediate set.

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