System and method for synchronizing multiple oscillators using reduced frequency signaling
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United States of America Patent
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Jan 9, 2018
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Jan 14, 2015
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Jan 14, 2015
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Abstract
An embodiment method for voltage-controlled oscillator (VCO) control includes detecting a first VCO output signal of a first VCO. The first VCO output signal has a first VCO output frequency. The method also includes determining a first down-scaled signal in accordance with the first VCO output signal. The first down-scaled signal has a first down-scaled frequency that is reduced by a fixed ratio relative to a current value of the first VCO output frequency. The method also includes modifying the first VCO output frequency using a first phase lock loop (PLL) in accordance with the first down-scaled signal and an oscillating reference signal, and detecting a second VCO output signal of a second VCO. The second VCO output signal has a second VCO output frequency. The method also includes modifying the second VCO output frequency in accordance with the second VCO output signal and the first down-scaled signal.
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