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    • 2. 发明申请
    • WAKE-UP CIRCUIT AND AN ON BOARD UNIT INCLUDING THE SAME, A FILTER, METHODS FOR FREQUENCY DETECTION AND FILTERING
    • 唤醒电路和包括其的板上单元,滤波器,频率检测和滤波方法
    • US20120119799A1
    • 2012-05-17
    • US12961514
    • 2010-12-07
    • Jiazhou LiuDawei Guo
    • Jiazhou LiuDawei Guo
    • H03L7/00
    • H03K9/06G01R23/15G07C5/008
    • 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.
    • 一种唤醒电路,包括:控制信号产生电路,包括:脉冲发生器,被配置为接收数字信号并产生其频率的脉冲序列信号; 第一比较电路和第二比较电路,两者都耦合到脉冲发生器并被配置为接收脉冲序列信号; 第一比较电路被配置为将脉冲序列信号的频率与第一阈值频率进行比较,并产生第一控制信号; 第二比较电路被配置为将脉冲序列信号的频率与第二阈值频率进行比较,并产生第二控制信号; 频率检测器还包括:指示产生电路,被配置为如果脉冲序列信号的频率落在由第一和第二阈值频率限定的频率范围内,则产生唤醒指示。
    • 3. 发明授权
    • Amplitude shift keying demodulator and method for demodulating an ask signal
    • 幅移键控解调器和解调询问信号的方法
    • US08508293B2
    • 2013-08-13
    • US13405632
    • 2012-02-27
    • Jiazhou LiuDawei GuoYangeng Wang
    • Jiazhou LiuDawei GuoYangeng Wang
    • H03K9/02
    • H04L27/06H03D1/2272
    • An ASK demodulator comprises a rectification circuit which receives and rectifies an ASK signal to generate a rectified current; an active load circuit is coupled to the rectification circuit and receives the rectified current and present an impedance which is inversely proportional to at least a part of the rectified current when a frequency of a base band signal meets a preset condition; a comparator is coupled to the rectification circuit and the active load circuit and receives a reference voltage and a voltage generated based on, at least in part, the rectified current and the impedance, and compares the reference voltage and the generated voltage to generate a demodulated signal.
    • ASK解调器包括整流电路,其接收并整流ASK信号以产生整流电流; 有源负载电路耦合到整流电路,并且当基带信号的频率满足预设条件时,接收整流电流并呈现与至少一部分整流电流成反比的阻抗; 比较器耦合到整流电路和有源负载电路,并且接收基准电压和至少部分地基于整流电流和阻抗产生的电压,并且比较参考电压和产生的电压以产生解调的 信号。