Programmable-gain amplifier

A programmable-gain amplifier (PGA) is an electronic amplifier (typically based on an operational amplifier) whose gain can be controlled by external digital or analog signals.

[1] Examples for the external digital signals can be SPI, I²C while the latest PGAs can also be programmed for offset voltage trimming, as well as active output filters.

[1] Popular applications for these products are motor control, signal and sensor conditioning.

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