A low-noise precision amplification circuit based on an operational amplifier and a performance improvement method thereof

A low-noise precision amplification circuit based on an operational amplifier and a performance improvement method thereof

The invention discloses a method for improving the performance of a low-noise precision amplification circuit based on an operational amplifier, which comprises the following steps: firstly, acquiringthe impedance of a signal source in an application scene and the output noise, total harmonic distor...

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Hauptverfasser: WEI YUNMEI, LIU XIN, ZHAO PENG, CHONG YINBAO
Format: Patent
Sprache:chi ; eng
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AMPLIFIERS
BASIC ELECTRONIC CIRCUITRY
ELECTRICITY
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creator WEI YUNMEI
LIU XIN
ZHAO PENG
CHONG YINBAO
description The invention discloses a method for improving the performance of a low-noise precision amplification circuit based on an operational amplifier, which comprises the following steps: firstly, acquiringthe impedance of a signal source in an application scene and the output noise, total harmonic distortion and noise of a circuit needing to be improved, and determining the numerical value of a gain control potentiometer and the amplification gain of the circuit; Selecting a preset gain to adjust the original value of the potentiometer according to the signal source impedance; Then selecting the parallel connection number n of the buffer and cascade reverse amplification circuits and determining potentiometers; Selecting the number of resistor units; And finally, performing calculating according to the gain of the operational amplifier circuit, adjusting the value of a potentiometer and preset output impedance in combination with a preset gain, and adding a circuit adaptive part which is matched with the buffer an
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subjects AMPLIFIERS
BASIC ELECTRONIC CIRCUITRY
ELECTRICITY
title A low-noise precision amplification circuit based on an operational amplifier and a performance improvement method thereof
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