Invention Grant
- Patent Title: Oscillation stop detection circuit and electronic device
- Patent Title (中): 振荡停止检测电路和电子设备
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Application No.: US14188379Application Date: 2014-02-24
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Publication No.: US09106215B2Publication Date: 2015-08-11
- Inventor: Kotaro Watanabe , Makoto Mitani
- Applicant: Seiko Instruments Inc.
- Applicant Address: JP Chiba
- Assignee: SEIKO INSTRUMANTS INC.
- Current Assignee: SEIKO INSTRUMANTS INC.
- Current Assignee Address: JP Chiba
- Agency: Brinks Gilson & Lione
- Priority: JP2013-035061 20130225
- Main IPC: H03K5/19
- IPC: H03K5/19 ; G01R29/02

Abstract:
Provided is an oscillation stop detection circuit having low current consumption, which is capable of detecting stop of oscillation regardless of whether an input signal stops at High or Low and thereby accurately measuring an oscillation stop detection period. The oscillation stop detection circuit includes: a pulse generation circuit for outputting a one-shot pulse in synchronization with an oscillation signal input from an input terminal; a capacitor including one terminal connected to a first power supply terminal and another terminal connected to an output terminal; a constant current circuit connected between the first power supply terminal and the another terminal of the capacitor; and a switch circuit connected between an output terminal of the pulse generation circuit and the another terminal of the capacitor, for connecting the another terminal of the capacitor to a second power supply terminal based on the one-shot pulse.
Public/Granted literature
- US20140240054A1 OSCILLATION STOP DETECTION CIRCUIT AND ELECTRONIC DEVICE Public/Granted day:2014-08-28
Information query
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