Frequency synthesizer for handheld ultra-short wave frequency hopping radio station

Frequency synthesizer for handheld ultra-short wave frequency hopping radio station

The invention discloses a frequency synthesizer for a handheld ultra-short wave frequency hopping radio station. The frequency synthesizer comprises a direct digital frequency synthesizer circuit, a crystal oscillator, a phase-locked loop, a quadrature modulator, a loop filter, a voltage-controlled...

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Hauptverfasser: ZHANG CHAOCHAO, HUANG WENJIE, FAN HONGYI, SUN YUANYUAN, GUO YONGGANG, WANG TIEYONG, YIN MINGQI, CHEN FEI, LI ZHENYOU
Format: Patent
Sprache:chi ; eng
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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 ZHANG CHAOCHAO
HUANG WENJIE
FAN HONGYI
SUN YUANYUAN
GUO YONGGANG
WANG TIEYONG
YIN MINGQI
CHEN FEI
LI ZHENYOU
description The invention discloses a frequency synthesizer for a handheld ultra-short wave frequency hopping radio station. The frequency synthesizer comprises a direct digital frequency synthesizer circuit, a crystal oscillator, a phase-locked loop, a quadrature modulator, a loop filter, a voltage-controlled oscillator and an output operational amplifier; the phase-locked loop comprises an R frequency divider, an N frequency divider, a phase discriminator and a charge pump; the charge pump is further connected with a charge pump charge-discharge current control circuit, and the output end of the chargepump charge-discharge current control circuit is electrically connected with the input end of the charge pump; and the output end of the output operational amplifier is the output end of the frequencysynthesizer for the handheld ultra-short wave frequency hopping radio station. According to the frequency synthesizer for the handheld ultra-short wave frequency hopping radio station, locking and rapid switching of the frequ
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subjects AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATIONOF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
BASIC ELECTRONIC CIRCUITRY
ELECTRICITY
title Frequency synthesizer for handheld ultra-short wave frequency hopping radio station
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