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1. US20190339651 - Time-to-digital converter circuit

Office
United States of America
Application Number 16403774
Application Date 06.05.2019
Publication Number 20190339651
Publication Date 07.11.2019
Grant Number 10691074
Grant Date 23.06.2020
Publication Kind B2
IPC
G04F 10/00
GPHYSICS
04HOROLOGY
FTIME-INTERVAL MEASURING
10Apparatus for measuring unknown time intervals by electric means
H03L 7/197
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
LAUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
7Automatic control of frequency or phase; Synchronisation
06using a reference signal applied to a frequency- or phase-locked loop
16Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
18using a frequency divider or counter in the loop
197a time difference being used for locking the loop, the counter counting between numbers which are variable in time or the frequency divider dividing by a factor variable in time, e.g. for obtaining fractional frequency division
CPC
H03L 7/197
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
LAUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
7Automatic control of frequency or phase; Synchronisation
06using a reference signal applied to a frequency- or phase-locked loop
16Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
18using a frequency divider or counter in the loop
197a time difference being used for locking the loop, the counter counting between numbers which are variable in time or the frequency divider dividing by a factor variable in time, e.g. for obtaining fractional frequency division
G04F 10/005
GPHYSICS
04HOROLOGY
FTIME-INTERVAL MEASURING
10Apparatus for measuring unknown time intervals by electric means
005Time-to-digital converters [TDC]
Applicants TEXAS INSTRUMENTS INCORPORATED
Inventors Henry Yao
Sinjeet Dhanvantray Parekh
Agents Ray A. King
Charles A. Brill
Frank D. Cimino
Title
(EN) Time-to-digital converter circuit
Abstract
(EN)

A time-to-digital converter circuit includes a logic gate coupled to receive a first trigger signal indicative of a first clock signal and a second trigger signal indicative of a second clock signal. The logic gate is to generate a logic gate output signal responsive to the earlier of the first or second trigger signals to be a logic high. A synchronization circuit is included and is coupled to the logic gate and is configured to synchronize the logic gate output signal to a third clock to produce a synchronization output signal. A counter circuit counts pulses of the synchronization output signal.


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