JPS57186837A - Phase lock loop oscillating circuit - Google Patents

Phase lock loop oscillating circuit

Info

Publication number
JPS57186837A
JPS57186837A JP56071449A JP7144981A JPS57186837A JP S57186837 A JPS57186837 A JP S57186837A JP 56071449 A JP56071449 A JP 56071449A JP 7144981 A JP7144981 A JP 7144981A JP S57186837 A JPS57186837 A JP S57186837A
Authority
JP
Japan
Prior art keywords
phase
frequency
pulse
output
vco13
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP56071449A
Other languages
Japanese (ja)
Inventor
Michio Suzuki
Daiki Nabeshima
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP56071449A priority Critical patent/JPS57186837A/en
Publication of JPS57186837A publication Critical patent/JPS57186837A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
    • H03L7/08—Details of the phase-locked loop
    • H03L7/10—Details of the phase-locked loop for assuring initial synchronisation or for broadening the capture range
    • H03L7/104—Details of the phase-locked loop for assuring initial synchronisation or for broadening the capture range using an additional signal from outside the loop for setting or controlling a parameter in the loop

Landscapes

  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)

Abstract

PURPOSE:To shorten a synchronizing stable time, by detecting phase against a frequency source by a phase detecting pulse obtained from inside of a frequency divider, generating an inverted pulse from a gate circuit when being about >=90 deg. out-of-phase with stable phase, and reversing phase in accordance with magnitude of a phase shift. CONSTITUTION:Frequency within a constant range is oscillated by a VCO13 constituting a part of a PLL circuit, an output of an LPF12 is compared with voltage of reference voltage 14, and oscillation frequency is varied to >=2 times a frequency source 14. An output of this VCO13 is frequency-divided to frequency being close to the frequency source 14 by a frequency divider 16, the output in case when the frequency is being divided is provided to a phase comparator and detector 17 as a reference pulse 19, the pulse 19 and the frequency source 14 are compared with each phase by the detector 17, and in case of >= about 90 deg. and <=270 deg. out-of-phase, an inversion instructing pulse is provided to an invertor. Subsequently, the frequency source 14 and an output of the invertor 18 are compared to each phase by a phase comparator 1, a pulse of width having only a phase difference portion is outputted, is provided to the VCO13 through the LPF12, and the synchronizing stable time is shortened.
JP56071449A 1981-05-14 1981-05-14 Phase lock loop oscillating circuit Pending JPS57186837A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56071449A JPS57186837A (en) 1981-05-14 1981-05-14 Phase lock loop oscillating circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56071449A JPS57186837A (en) 1981-05-14 1981-05-14 Phase lock loop oscillating circuit

Publications (1)

Publication Number Publication Date
JPS57186837A true JPS57186837A (en) 1982-11-17

Family

ID=13460870

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56071449A Pending JPS57186837A (en) 1981-05-14 1981-05-14 Phase lock loop oscillating circuit

Country Status (1)

Country Link
JP (1) JPS57186837A (en)

Similar Documents

Publication Publication Date Title
KR890009098A (en) Voltage controlled oscillation circuit
ATE128293T1 (en) INTERPOLATING FREQUENCY SYNTHESIZER WITH PHASE-LOCKED LOOP.
EP0766404A3 (en) Clock generator utilizing phase locked loop circuit
JPS57186837A (en) Phase lock loop oscillating circuit
CA2192881A1 (en) PLL Circuit and Noise Reduction Means for PLL Circuit
TWI264876B (en) PLL frequency synthesizer
ES426500A1 (en) Frequency synthesizer having phase-locked loop including sample and hold circuit frequency converter
JPS5550191A (en) Electronic timepiece
GB2000651A (en) Master clock arrangement
JPS57174939A (en) Phase locked loop circuit
JPS5571328A (en) Frequency synthesizer
DK224688D0 (en) OSCILLATOR EQUIPMENT TO PROVIDE AT LEAST TWO DIFFERENT FREQUENCIES
JPS566528A (en) Signal converter
JPS54154211A (en) Local oscillation circuit
JPS6429174A (en) Clock generation circuit
JPS6443768A (en) Spectrum analyzer
JPS5683136A (en) Frequency synthesizer
JPS5696533A (en) Digital pll circuit
JPS56119533A (en) Pll circuit
JPS6432532A (en) Phase locked loop circuit
JPS54121610A (en) Pll circuit of radio receiver
JPS54139317A (en) Am ssb transmitter/receiver
JPS55162605A (en) Fm modulation unit
JPS5530273A (en) Pll synthesizer
JPS5776933A (en) Superheterodyne receiver