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公开(公告)号：US5986512A
公开(公告)日：1999-11-16
申请号：US989864
申请日：1997-12-12
IPC分类号： H03C3/00 , H03C3/09 , H03L7/183 , H03L7/197 , H03M7/00 , H04B14/06 , H04L27/12 , H04L27/20 , H03K23/68
CPC分类号： H03M7/3008 , H03L7/1976 , H04L27/2017 , H03C3/0908 , H03M7/3022 , H03M7/304
摘要： A .SIGMA..DELTA. modulator-controlled, phase-locked-loop circuit, and an associated method, generates a frequency-regulated signal which does not exhibit undesired tones. Dithering signals are generated and are provided to a .SIGMA..DELTA. modulator. The .SIGMA..DELTA. modulator forms a division-factor control signal used to control the division factor of a frequency divider forming a portion of the PLL circuit. The dithering signals applied to the .SIGMA..DELTA. modulator reduce the likelihood that the .SIGMA..DELTA. modulator shall enter a limit cycle and generate repetitive output signals.
摘要翻译： SIGMA DELTA调制器控制的锁相环电路和相关联的方法产生不显示不需要的音调的频率调节信号。 产生抖动信号并提供给SIGMA DELTA调制器。 SIGMA DELTA调制器形成分频因子控制信号，用于控制形成PLL电路的一部分的分频器的分频系数。 施加到SIGMA DELTA调制器的抖动信号降低了SIGMA DELTA调制器进入极限周期并产生重复输出信号的可能性。
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2.发明授权Method and apparatus for generating a linearly modulated signal using polar modulation 有权用极化调制产生线性调制信号的方法和装置
公开(公告)号：US6101224A
公开(公告)日：2000-08-08
申请号：US167658
申请日：1998-10-07
CPC分类号： H03C5/00
摘要： An apparatus and method generate a linearly modulated signal in a polar modulation system. A signal for transmission is separated into a phase component and an amplitude component, and a carrier signal is modulated with the phase component in a phase modulator, creating a phase distortion. A compensator compensates for the phase distortion created by the phase modulator by modifying the amplitude component. The phase modulated carrier signal is amplitude modulated by the compensated amplitude component to produce a linearly modulated signal.
摘要翻译： 一种装置和方法在极化调制系统中产生线性调制信号。 用于传输的信号被分成相位分量和幅度分量，并且在相位调制器中用相位分量调制载波信号，产生相位失真。 补偿器通过修改幅度分量来补偿由相位调制器产生的相位失真。 相位调制载波信号由补偿幅度分量进行幅度调制，以产生线性调制信号。
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