发明名称 |
Oscillation-stop detection circuit, oscillation-stop detection system, electronic device, and oscillation-stop detection method |
摘要 |
An oscillation-stop detection circuit includes a switching unit that repeats turning on and off based on a cycle of an oscillation signal from an outside; a capacitor that is charged when the switching unit is turned on, and discharged when the switching unit is turned off; a first MOS transistor that flows a discharge current of the capacitor when the capacitor is discharged; a discharge cutoff unit that cuts off a discharge path for the discharge current to flow, for a predetermined time right after a power is turned on; and a detecting unit that detects a status of the oscillation signal based on a voltage of the capacitor.
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申请公布号 |
US2005195044(A1) |
申请公布日期 |
2005.09.08 |
申请号 |
US20050071285 |
申请日期 |
2005.03.04 |
申请人 |
CITIZEN WATCH CO., LTD. |
发明人 |
HITOMI MASAHIKO;SHIMOZURU MASASHI |
分类号 |
H03K3/26;(IPC1-7):H03K3/26 |
主分类号 |
H03K3/26 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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