JPS5616328A - Phase synchronous loop device - Google Patents

Phase synchronous loop device

Info

Publication number
JPS5616328A
JPS5616328A JP9221579A JP9221579A JPS5616328A JP S5616328 A JPS5616328 A JP S5616328A JP 9221579 A JP9221579 A JP 9221579A JP 9221579 A JP9221579 A JP 9221579A JP S5616328 A JPS5616328 A JP S5616328A
Authority
JP
Japan
Prior art keywords
lpf
pass band
oscillator
control
noise
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
JP9221579A
Other languages
Japanese (ja)
Inventor
Kazumi Sato
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP9221579A priority Critical patent/JPS5616328A/en
Publication of JPS5616328A publication Critical patent/JPS5616328A/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
    • H03L7/085—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal
    • H03L7/093—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal using special filtering or amplification characteristics in the loop

Landscapes

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

Abstract

PURPOSE:To reduce the noise and then stabilize the operation of the oscillator with a low-cost constitution, by making variable the pass band of the LPF of the phase synchronous loop device and then detecting the noise contained in the LPF to control the LPF as well as give the control to the pass band. CONSTITUTION:The output of signal source 1 is supplied to phase comparator 2 to detect the phase difference to the output signal of voltage control oscillator 6, and then supplied to variable pass band LPF7. The AC noise component contained in the DC output component of LPF7 is detected by control circuit 8, and LPF7 is controlled by the detection signal to give the control to the pass band. The noise output increases immediately after the signal frequency sent from signal 1 varied. In this connection, the pass band of the LPF is increased, and the control is given to the LPF in order to secure a quick response of oscillator 6. Then the pass band of the LPF is reduced after oscillator 6 followed the frequency change sufficiently, and thus the noise signal can be cut off effectively. As a resulst, only one unit of LPF suffices to simplify the constitution and then realize a low-cost device. At the same time, the operation of the oscillator can be stabilized.
JP9221579A 1979-07-19 1979-07-19 Phase synchronous loop device Pending JPS5616328A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9221579A JPS5616328A (en) 1979-07-19 1979-07-19 Phase synchronous loop device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9221579A JPS5616328A (en) 1979-07-19 1979-07-19 Phase synchronous loop device

Publications (1)

Publication Number Publication Date
JPS5616328A true JPS5616328A (en) 1981-02-17

Family

ID=14048210

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9221579A Pending JPS5616328A (en) 1979-07-19 1979-07-19 Phase synchronous loop device

Country Status (1)

Country Link
JP (1) JPS5616328A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4479091A (en) * 1980-12-03 1984-10-23 Alps Electric Co., Ltd. Phase locked loop FM demodulator with variable bandwidth loop filter
JPS60189327A (en) * 1984-03-08 1985-09-26 Sanyo Electric Co Ltd Pll circuit
JPS61134126A (en) * 1984-12-05 1986-06-21 Matsushita Electric Ind Co Ltd Phase synchronous type frequency synthesizer
JPS63309024A (en) * 1987-04-17 1988-12-16 サントル・ナシオナル・デチュド・スパシアル Time standard apparatus with substantially constant stability for short term and long term time measurement
JPH01270414A (en) * 1988-04-22 1989-10-27 Nec Corp Phase synchronous oscillating circuit
JPH07297707A (en) * 1994-04-27 1995-11-10 Nec Corp Phase locked loop oscillator circuit

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4479091A (en) * 1980-12-03 1984-10-23 Alps Electric Co., Ltd. Phase locked loop FM demodulator with variable bandwidth loop filter
JPS60189327A (en) * 1984-03-08 1985-09-26 Sanyo Electric Co Ltd Pll circuit
JPS61134126A (en) * 1984-12-05 1986-06-21 Matsushita Electric Ind Co Ltd Phase synchronous type frequency synthesizer
JPS63309024A (en) * 1987-04-17 1988-12-16 サントル・ナシオナル・デチュド・スパシアル Time standard apparatus with substantially constant stability for short term and long term time measurement
JPH01270414A (en) * 1988-04-22 1989-10-27 Nec Corp Phase synchronous oscillating circuit
JPH07297707A (en) * 1994-04-27 1995-11-10 Nec Corp Phase locked loop oscillator circuit

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