An IV conversion circuit and infrared receiver chip resistant to strong light interference
By shunting the photocurrent in the IV conversion circuit and adjusting the output voltage using the amplifier feedback voltage, the problem of small signal distortion under strong light was solved, and high-quality signal processing under strong light conditions was achieved.
CN116257108BActive Publication Date: 2026-05-26NINGBO AIXIN MICROELECTRONICS CO LTD
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Patent Information
- Application Number
- CN202310164813.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-02-13
- Publication Date
- 2026-05-26
- Estimated Expiration
- 2043-02-13
AI Technical Summary
Technical Problem
Existing technologies suffer from problems such as small signal distortion and reduced signal quality due to continuously increasing output voltage under strong light conditions.
Method used
By shunting the photocurrent and adjusting the output voltage using amplifier feedback voltage, PMOS and NMOS transistors are used in conjunction with capacitors and other components to control the range of output voltage variation and avoid small-signal distortion.
Benefits of technology
Under strong light conditions, maintain accurate processing of small signals, avoid excessive increase in output voltage, and improve signal quality.
✦ Generated by Eureka AI based on patent content.
Abstract
This invention discloses an I-V conversion circuit resistant to strong light interference, relating to the field of integrated circuit technology. It includes an infrared photodiode VD, resistors R1 and R2, an amplifier AMP, and PMOS transistors M1, M2, and C. The invention also discloses an I-V conversion circuit resistant to strong light interference, including an infrared photodiode VD, resistors R1 and R2, amplifiers AMP1 and AMP2, NMOS transistors M1, M2, and M3, and capacitor C. Furthermore, the invention discloses an infrared receiving chip incorporating the aforementioned I-V conversion circuit resistant to strong light interference. Under strong light conditions, this invention prevents the output voltage OUT from continuously increasing, effectively receiving, identifying, and amplifying the input signal, thus improving signal quality and reducing distortion.
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