Invention Grant
US08750441B2 Signal cancellation to reduce phase noise, period jitter, and other contamination in local oscillator, frequency timing, or other timing generators or signal sources
有权
信号消除以减少本地振荡器，频率定时或其他定时发生器或信号源中的相位噪声，周期抖动和其他污染
- Patent Title: Signal cancellation to reduce phase noise, period jitter, and other contamination in local oscillator, frequency timing, or other timing generators or signal sources
- Patent Title (中): 信号消除以减少本地振荡器，频率定时或其他定时发生器或信号源中的相位噪声，周期抖动和其他污染
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Application No.: US13329533Application Date: 2011-12-19
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Publication No.: US08750441B2Publication Date: 2014-06-10
- Inventor: Lawrence H. Zuckerman
- Applicant: Lawrence H. Zuckerman
- Applicant Address: US TX Dallas
- Assignee: Texas Instruments Incorporated
- Current Assignee: Texas Instruments Incorporated
- Current Assignee Address: US TX Dallas
- Agent Andrew Viger; Wade J. Brady, III; Frederick J. Telecky, Jr.
- Main IPC: H03K5/00
- IPC: H03K5/00
Abstract:
A method includes obtaining an input signal and demodulating phase contamination in the input signal to generate a baseband signal. The method also includes modulating the input signal based on the baseband signal to generate an output signal, where the output signal has less phase contamination than the input signal. The phase contamination could be demodulated using a phase demodulator or a frequency modulation (FM) detector. A portion of the input signal could be down-converted to a lower frequency, and the phase contamination in the down-converted portion of the input signal could be demodulated. Additional phase contamination in the output signal can be demodulated and used to regulate a level of the baseband signal used during modulation of the input signal. The output signal could have less phase noise or period jitter than the input signal.
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