发明授权
US08274313B2 Wake-up circuit and an on board unit including the same, a filter, methods for frequency detection and filtering
有权
唤醒电路和包括相同的板载单元，滤波器，频率检测和滤波方法
- 专利标题： Wake-up circuit and an on board unit including the same, a filter, methods for frequency detection and filtering
- 专利标题（中）： 唤醒电路和包括相同的板载单元，滤波器，频率检测和滤波方法
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申请号： US12961514申请日： 2010-12-07
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公开(公告)号： US08274313B2公开(公告)日： 2012-09-25
- 发明人: Jiazhou Liu , Dawei Guo
- 申请人： Jiazhou Liu , Dawei Guo
- 申请人地址： CN Shanghai
- 专利权人： Beken Corporation
- 当前专利权人： Beken Corporation
- 当前专利权人地址： CN Shanghai
- 代理机构： Perkins Coie LLP
- 代理商 Aaron Winiger
- 优先权： CN201010545140 20101116
- 主分类号： G01R23/02
- IPC分类号： G01R23/02 ; H03D3/00 ; H03K9/06
摘要：
A wake-up circuit, comprising: a control signal generation circuit comprising: a pulse generator configured to receive a digital signal and generate a pulse sequence signal with a frequency thereof; a first comparison circuit and a second comparison circuit both coupled to the pulse generator and configured to receive the pulse sequence signal; the first comparison circuit is configured to compare the frequency of the pulse sequence signal with a first threshold frequency and generate a first control signal; the second comparison circuit is configured to compare the frequency of the pulse sequence signal with a second threshold frequency and generate a second control signal; the frequency detector further comprises: an indication generation circuit configured to generate a wake-up indication if the frequency of the pulse sequence signal falls within a frequency range defined by the first and second threshold frequencies.
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