用于二极管驱动器中的噪声抑制的方法及设备
By employing transistor source followers and constant current driving in LED and laser diode drivers, the problems of current fluctuation and noise caused by voltage fluctuations are solved, achieving current stability and constant light intensity, thus improving the performance of photodetectors.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- AVAGO TECHNOLOGIES INTERNATIONAL SALES PTE LTD
- Filing Date
- 2024-03-25
- Publication Date
- 2026-07-17
AI Technical Summary
In existing LED and laser diode drivers, voltage fluctuations caused by power switching lead to current fluctuations, affecting light intensity and interfering with the photodetector signal. Furthermore, noise currents caused by parasitic capacitance are difficult to suppress effectively.
By using a transistor configuration as a source follower, and by mirror biasing and biasing the transistor in the saturation region, combined with the source follower and constant current drive, the influence of parasitic capacitance is reduced, and noise is filtered by a capacitor to ensure current stability.
It achieves constant current for LEDs and laser diodes, reduces light intensity fluctuations and noise interference, and improves the signal quality of the photodetector.
Smart Images
Figure CN118714696B_ABST