Time-to-digital conversion with latch-based ring

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United States of America Patent

PATENT NO 9864341
SERIAL NO

15368375

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Abstract

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An integrated circuit (IC) is disclosed for time-to-digital conversion with a latch-based ring. In example aspects, the IC includes a ring, a counter, an encoder, and time-to-digital converter (TDC) control circuitry. The ring includes multiple ring stages and propagates a ring signal between successive ring stages. Each respective ring stage includes latch circuitry to secure a state of the ring signal at the respective ring stage. The ring provides a ring output signal using the latch circuitry of each of the ring stages. The ring is coupled to the counter. The counter increments a counter value responsive to the ring signal and provides a counter output signal based on the counter value. The encoder is coupled to the ring and the counter. The encoder generates a TDC output signal based on the ring and counter output signals. The TDC control circuitry operates the ring responsive to a TDC input signal.

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Patent Owner(s)

Patent OwnerAddress
QUALCOMM INCORPORATED5775 MOREHOUSE DRIVE SAN DIEGO CA 92121-1714

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Zhuang, Jingcheng San Diego, US 30 298

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