Voltage controlled oscillator runaway prevention

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United States of America Patent

PATENT NO 9391623
SERIAL NO

14992164

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A feedback module for preventing voltage controlled oscillator (VCO) runaway in a phase locked loop (PLL) circuit can include a first, a second, and a third input to receive a first output signal from a PLL circuit, a reference signal, and a first control signal. The feedback module may also include a feedback circuit to generate a second control signal, the second control signal being coupled to an input of the PLL circuit, wherein the feedback circuit generates the second control signal by comparing a number of cycles of the first output signal to a first threshold, and a number of cycles of the reference signal to a second threshold.

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Patent Owner(s)

  • INTERNATIONAL BUSINESS MACHINES CORPORATION

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Friend, David M Rochester, US 23 45
Strom, James D Rochester, US 36 123
Wagstaff, Alan P Rochester, US 16 41

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