Low-frequency weak photoelectric detection circuit
By designing a low-frequency weak photoelectric detection circuit, combined with a photoelectric sensor bias circuit and a filtering and amplification module, the problems of signal distortion and noise in low-light signal detection are solved, achieving high-precision signal conversion and filtering, which is suitable for low-frequency circuit applications.
CN116793487BActive Publication Date: 2026-07-03FUDAN UNIVERSITY
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- FUDAN UNIVERSITY
- Filing Date
- 2023-05-08
- Publication Date
- 2026-07-03
Smart Images
Figure CN116793487B_ABST
Abstract
The application discloses a low-frequency weak photoelectric conversion circuit; the converted electric signal has the advantages of small noise and large bandwidth; the structure comprises a photoelectric sensor bias circuit module, a high-pass filter amplification module and a low-pass filter amplification module; the photoelectric sensor bias circuit module, the high-pass filter amplification module and the low-pass filter amplification module are connected in series. The application provides a weak light signal photoelectric conversion circuit, which can convert weak photoelectric current signals into voltage signals and can filter and reduce noise well; in addition, the low-frequency weak photoelectric conversion circuit can detect signals in a frequency range of 20Hz-100kHz and can be applied to various low-frequency circuit occasions.
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