Circuit for automatically measuring gain of built-in trans-impedance amplifier

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United States of America Patent

PATENT NO 10097147
APP PUB NO 20180262171A1
SERIAL NO

15703990

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Abstract

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A circuit for automatically measuring gain of a built-in trans-impedance amplifier includes a current source built in a trans-impedance amplifier chip for generating a constant current to an input end of the trans-impedance amplifier. The circuit samples a voltage amplitude at an output end of the trans-impedance amplifier using a voltage amplitude sampling device, and calculates the gain of the trans-impedance amplifier. The current source has a constant reference voltage source, a reference current generator, a clock source, an AC switch, and an off-chip precision resistor. The circuit is configured to measure gain of trans-impedance amplifiers directly.

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Patent Owner(s)

  • XIAMEN UX HIGH-SPEED IC CO., LTD.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Lin, Shaoheng Xiamen, CN 4 3

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