一种二级电源电路
By adding a low-voltage adaptation circuit to the existing secondary power supply circuit, the problem of insufficient output voltage caused by low power supply voltage is solved, and the effect of normal operation under low voltage conditions is achieved.
CN115694183BActive Publication Date: 2026-07-17SHANGHAI HUAHONG GRACE SEMICON MFG CORP
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHANGHAI HUAHONG GRACE SEMICON MFG CORP
- Filing Date
- 2022-10-31
- Publication Date
- 2026-07-17
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Figure CN115694183B_ABST
Abstract
本发明公开了一种二级电源电路，包括：参考偏置电流源，用于给第一镜像恒流源提供稳定的偏置电流；第一镜像恒流源，用于将所述偏置电流转换为设定的电流；源极跟随器，用于将所述第一镜像恒流源的输出电压进行跟随输出；输出供电电路，用于根据所述源极跟随器的输出设定所述二级电源电路的输出电压；低电压适应电路，用于在源极跟随器栅极节点电压控制下，在电源电压VDDA较低时重新设定所述二级电源电路的输出电压，通过本发明，可以在电源电压VDDA较低时能获得较高的输出电压。
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