Invention Grant
US09438073B2 Power supply switching circuit, real time clock device, electronic apparatus, mobile unit, and method of controlling power supply switching circuit
有权
电源开关电路，实时时钟装置，电子设备，移动单元以及电源开关电路的控制方法
- Patent Title: Power supply switching circuit, real time clock device, electronic apparatus, mobile unit, and method of controlling power supply switching circuit
- Patent Title (中): 电源开关电路，实时时钟装置，电子设备，移动单元以及电源开关电路的控制方法
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Application No.: US13927556Application Date: 2013-06-26
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Publication No.: US09438073B2Publication Date: 2016-09-06
- Inventor: Masayuki Kamiyama , Hiroshi Kiya
- Applicant: Seiko Epson Corporation
- Applicant Address: JP
- Assignee: Seiko Epson Corporation
- Current Assignee: Seiko Epson Corporation
- Current Assignee Address: JP
- Agency: Harness, Dickey & Pierce, P.L.C.
- Priority: JP2012-153570 20120709
- Main IPC: H02J9/06
- IPC: H02J9/06 ; G06F1/26 ; G06F1/30
Abstract:
A power supply switching circuit includes a switching circuit that electrically connects a VCC terminal and a VBK terminal in a connected state, a switch control circuit, and a power supply monitoring circuit that monitors a voltage of the VCC terminal, and outputs a voltage of the VBK terminal. The switch control circuit switches a mode from a normal mode in which the switching circuit is intermittently connected to a standby mode in which the switching circuit is opened according to an output signal of the power supply monitoring circuit.
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