WIDE CAPTURE RANGE REFERENCE-LESS FREQUENCY DETECTOR

WIDE CAPTURE RANGE REFERENCE-LESS FREQUENCY DETECTOR

A reference-less frequency detector circuit includes a sampling circuit that is configured to generate a frequency control voltage and a switch circuit control signal based on a frequency difference between a clock signal frequency and an input data rate. The frequency control voltage has a frequenc...

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Hauptverfasser: GU, Yifan, LEI, Gong, LEE, Hung-Yi, DANG, Yen, SHIH, Shou-Po, CAO, Yuming, GU, Liang, LIU, Miao, DESHPANDE, Mamatha
Format: Patent
Sprache:eng ; fre ; ger
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AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATIONOF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
BASIC ELECTRONIC CIRCUITRY
ELECTRICITY
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creator GU, Yifan
LEI, Gong
LEE, Hung-Yi
DANG, Yen
SHIH, Shou-Po
CAO, Yuming
GU, Liang
LIU, Miao
DESHPANDE, Mamatha
description A reference-less frequency detector circuit includes a sampling circuit that is configured to generate a frequency control voltage and a switch circuit control signal based on a frequency difference between a clock signal frequency and an input data rate. The frequency control voltage has a frequency down indication and a frequency up indication. A voltage-to-current converter circuit is coupled to the sampling circuit and is configured to convert the frequency control voltage to a frequency control current based on the switch circuit control signal. The voltage-to-current converter circuit includes an output switch circuit controlled by the switch control signal and is configured to have substantially equal respective latencies for the frequency down indication and the frequency up indication.
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subjects AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATIONOF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
BASIC ELECTRONIC CIRCUITRY
ELECTRICITY
title WIDE CAPTURE RANGE REFERENCE-LESS FREQUENCY DETECTOR
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