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Programmable-gain amplifier : ウィキペディア英語版 | Programmable-gain amplifier
A programmable-gain amplifier (PGA) is an electronic amplifier (typically an operational amplifier) whose gain can be controlled by external digital or analog signals. The gain can be set from less than 1V/V to over 100V/V. 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.〔(PGA103 ) from Texas Instruments, and (MAX9939 ) from Maxim Integrated Products〕 Popular applications for these products are motor control, signal and sensor conditioning. ==References== 〔
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