Photoelectric sensing integrated chip applied to smart home
A photoelectric sensing and integrated chip technology, applied in the field of photoelectric sensors, can solve the problems that the electrical signal is easily affected by the outside world, the package size cannot be further reduced, and the input data error, etc., to overcome the poor short-wave response and the large junction capacitance , the effect of increased bandwidth
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[0026] The silicon-based monolithic optoelectronic integrated receiving chip described in the embodiment of the present invention is manufactured by a 0.5 μm standard BCD process, and is equipped with a silicon-based photodetector and a corresponding preamplifier circuit.
[0027] see figure 1 , the embodiment of the present invention is provided with the first silicon-based photodetector PD1, the first transimpedance preamplifier TIA1, the first DC negative feedback circuit Rf1, the second silicon-based photodetector PD2, the second mutual Resistance preamplifier TIA2, the second DC negative feedback circuit Rf2, limiting amplifier LA, output buffer circuit OB.
[0028] The output terminal of the first silicon-based photodetector PD1 is connected to the input terminal of the first transimpedance preamplifier TIA1, and the output terminal of the first transimpedance preamplifier TIA1 is connected to the first differential input terminal of the limiting amplifier LA, The outpu...
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