Invention Grant
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
- Patent Title: Wake-up circuit and an on board unit including the same, a filter, methods for frequency detection and filtering
- Patent Title (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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Application No.: US12961514Application Date: 2010-12-07
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Publication No.: US08274313B2Publication Date: 2012-09-25
- Inventor: Jiazhou Liu , Dawei Guo
- Applicant: Jiazhou Liu , Dawei Guo
- Applicant Address: CN Shanghai
- Assignee: Beken Corporation
- Current Assignee: Beken Corporation
- Current Assignee Address: CN Shanghai
- Agency: Perkins Coie LLP
- Agent Aaron Winiger
- Priority: CN201010545140 20101116
- Main IPC: G01R23/02
- IPC: G01R23/02 ; H03D3/00 ; H03K9/06
Abstract:
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.
Public/Granted literature
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