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    • 82. 发明申请
    • Pll circuit, demodulator circuit, ic card, and ic card processing apparatus
    • Pll电路,解调电路,ic卡和ic卡处理装置
    • US20060255156A1
    • 2006-11-16
    • US10549754
    • 2005-02-14
    • Shigeru ArisawaCheng Zhang
    • Shigeru ArisawaCheng Zhang
    • G06K19/06
    • H04L25/49H03D3/241H04L25/4904
    • The present invention is directed to a demodulating circuit adapted for reproducing, from an input signal which has been caused to undergo transmission through a desired transmission system, data sequential caused to undergo transmission through the input signal, which is adapted to perform phase comparison, by Exclusive-OR (EX-OR) circuits (254Q), (254I), between a first oscillating output signal generated by an oscillator (252) and a variable frequency divider (253) and a second oscillating output signal different from the first oscillating output signal by 90 degrees [π/2] in phase to judge control direction by a control direction judgment circuit (257) on the basis of polarities of the phase comparison results to integrate the control direction judgment results by one period of the input signal by an integrating circuit (258) to perform correction processing having a predetermined controlled variable in the case where phase difference is [±π/2] on the basis of the phase comparison result by a correction circuit (259) with respect to the integrated result to control the operation of the variable frequency divider (253) by the correction-processed control signal outputted once per each period.
    • 本发明涉及一种解调电路,其适于从已经被引导通过期望的传输系统进行传输的输入信号再现通过输入信号进行传输的数据顺序,该输入信号适于执行相位比较,通过 在由振荡器(252)产生的第一振荡输出信号和可变分频器(253)之间的异或(EX-OR)电路(254Q),(254I))和不同于第一 基于相位比较结果的极性,通过控制方向判断电路(257)将相位振荡输出信号相差90度[π/ 2]来判断控制方向,以将控制方向判断结果整合到输入信号的一个周期 通过积分电路(258),在相位差为[±pi / 2]的情况下进行具有预定的受控变量的校正处理,基于ph 通过校正电路(259)相对于积分结果的比较结果,以通过每个周期输出一次的经校正处理的控制信号来控制可变分频器(253)的操作。