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    • 5. 发明专利
    • Synchronous detection circuit, receiver, and detection method
    • 同步检测电路,接收器和检测方法
    • JP2013016909A
    • 2013-01-24
    • JP2011146407
    • 2011-06-30
    • Lintec Corpリンテック株式会社Cdn Corp株式会社 シーディエヌ
    • KIKUCHI KAZUHIRONODA RYUZO
    • H04B1/59G06K17/00H04B5/02
    • PROBLEM TO BE SOLVED: To provide a synchronous detection circuit, a receiver, and a detection method, capable of acquiring modulation signals appropriately.SOLUTION: A synchronous detection circuit includes: an oscillator 31 for oscillating a signal having the same frequency as a carrier wave in a reception radio wave; a synchronization signal generation circuit 35 for generating, from the signal generated by the oscillator 31, a first synchronization signal having the same frequency as the carrier wave, and a second synchronization signal having the same frequency as the first synchronization signal and having a phase shifted for π/2 from the first synchronization signal; a phase shift circuit 36 for generating first and second phase shift signals by shifting each phase of the first and the second synchronization signals for a prescribed angle while maintaining the phase difference between the first and the second synchronization signals; a multiplier 37 for multiplying a reception signal on a reception radio wave by the first phase shift signal; a multiplier 38 for multiplying the reception signal by the second phase shift signal; a smoothing circuit (LPF39, 40) for smoothing the signals generated by each of the multipliers 37 and 38; an acquisition circuit 43 for acquiring a modulation signal on the basis of the signal smoothed.
    • 要解决的问题:提供能够适当地获取调制信号的同步检测电路,接收机和检测方法。 解决方案:同步检测电路包括:用于在接收无线电波中振荡具有与载波相同频率的信号的振荡器31; 同步信号生成电路35,用于根据由振荡器31产生的信号产生与载波相同频率的第一同步信号,以及具有与第一同步信号相同的频率并具有相移的第二同步信号 对于来自第一同步信号的π/ 2; 相移电路36,用于通过在保持第一和第二同步信号之间的相位差的同时将第一和第二同步信号的每个相位移位规定的角度来产生第一和第二相移信号; 乘法器37,用于将接收无线电波上的接收信号乘以第一相移信号; 乘法器38,用于将接收信号乘以第二相移信号; 平滑电路(LPF39,40),用于平滑由乘法器37和38中的每一个产生的信号; 获取电路43,用于基于平滑的信号获取调制信号。 版权所有(C)2013,JPO&INPIT
    • 6. 发明专利
    • Oscillation circuit, active tag, and oscillation output control method
    • 振荡电路,有源标签和振荡输出控制方法
    • JP2011211500A
    • 2011-10-20
    • JP2010077471
    • 2010-03-30
    • Cdn CorpLintec Corpリンテック株式会社株式会社 シーディエヌ
    • KATAKURA KATSUMINODA RYUZO
    • H03B5/30
    • PROBLEM TO BE SOLVED: To provide an oscillation circuit capable of suppressing a change in output characteristic and simplifying a constitution, an active tag, and an oscillation output control method.SOLUTION: An oscillation circuit 3 which outputs an AC current includes a power supply, a transistor Q which contains an emitter Q3, a base Q2, and a collector Q1 which is applied with a DC voltage from the power supply section, an output terminal T which is connected to the collector Q1 and outputs an AC current, a voltage measuring means (A-D converter) 53 which measures an emitter voltage outputted from the emitter Q3, and a voltage control means (CPU) 6 which controls a base voltage applied to the base Q2 so that the emitter voltage is kept constant based on the measuring result of the emitter voltage by the voltage measuring means 53.
    • 要解决的问题:提供一种能够抑制输出特性变化并简化结构,有源标签和振荡输出控制方法的振荡电路。解决方案:输出AC电流的振荡电路3包括电源, 晶体管Q包含发射极Q3,基极Q2和从电源部分施加直流电压的集电极Q1,与集电极Q1连接并输出交流电流的输出端子T,电压测量 测量从发射极Q3输出的发射极电压的装置(AD转换器)53和控制施加到基极Q2的基极电压的电压控制装置(CPU)6,以便基于测量结果 通过电压测量装置53的发射极电压。