Quick response automatic gain control method for trans-impedance amplifier
A technology of automatic gain control and transimpedance amplifier, applied in the direction of amplification control, gain control, electrical components, etc., can solve the problems of large TIA dynamic range, difficult adjustment, small transimpedance gain, etc., and achieve large transimpedance gain adjustment range, design flexibility, and the effect of widening the dynamic range
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[0031] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the present invention.
[0032] Such as image 3 As shown, the fast response automatic gain control method for the transimpedance amplifier in the preferred embodiment of the present invention comprises the following steps:
[0033] A. Detect the output amplitude of the transimpedance amplifier;
[0034] B. Compare the output amplitude with the reference signal representing the amplitude threshold; if the output amplitude is less than the threshold, disconnect the parallel connection between the active resistor and the passive resistor, so that the transimpedance gain of the transimpedance amplifier is equal to the resistance of the passive resistor ; If the output amplitude is greater than the threshold...
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Abstract
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