Method and circuits for phase-locked loops

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United States of America Patent

PATENT NO 9900144
SERIAL NO

15094374

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Abstract

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A phase lock loop (PLL) includes: a binary phase detector configured to generate a first and second polarity signals that respectively indicating whether an incoming data stream is leading a feedback signal, or whether the feedback signal is leading the incoming data stream, wherein a difference between the first and second polarity signals does not represent an amount of phase difference between the incoming data stream and the feedback signal; a digital filter configured to: generate filtered first polarity signal on a first path and a second path that are different; and generate filtered second polarity signal on a third path and a fourth path that are different; a charge pump coupled to the digital filter and configured to: integrate the filtered first polarity signal and the filtered second polarity signal; and an oscillator configured to generate the synthesized clock signal serving as the feedback signal.

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Patent Owner(s)

Patent OwnerAddress
ANALOG BITS INC945 STEWART DRIVE STE 250 SUNNYVALE CA 94085

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bhagwan, Raghunand Sunnyvale, US 17 177
Murali, Kowshik San Francisco, US 3 11
Rogers, Alan C Palo Alto, US 51 557

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