JPS5669934A - Leading-in sweep device of pll circuit - Google Patents

Leading-in sweep device of pll circuit

Info

Publication number
JPS5669934A
JPS5669934A JP14621379A JP14621379A JPS5669934A JP S5669934 A JPS5669934 A JP S5669934A JP 14621379 A JP14621379 A JP 14621379A JP 14621379 A JP14621379 A JP 14621379A JP S5669934 A JPS5669934 A JP S5669934A
Authority
JP
Japan
Prior art keywords
output
pll circuit
level
rises
low level
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.)
Granted
Application number
JP14621379A
Other languages
Japanese (ja)
Other versions
JPH0530089B2 (en
Inventor
Ryuichi Naito
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.)
Pioneer Corp
Original Assignee
Pioneer Electronic 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 Pioneer Electronic Corp filed Critical Pioneer Electronic Corp
Priority to JP14621379A priority Critical patent/JPS5669934A/en
Publication of JPS5669934A publication Critical patent/JPS5669934A/en
Publication of JPH0530089B2 publication Critical patent/JPH0530089B2/ja
Granted 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
    • H03L7/12—Details of the phase-locked loop for assuring initial synchronisation or for broadening the capture range using a scanning signal

Landscapes

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

Abstract

PURPOSE:To facilitate IC implementation by allowing a PLL circuit to operate normally to maintain a lock state, by switching a selection switch by making a lock detector generate a high output while holding the output of FF at a low level when an input signal is in phase with the output signal of a voltage control oscillator. CONSTITUTION:Output A of loop filter 4 reaches reference voltage Vm at time t2 and output C of comparator 9 rises in level, inverting FF7 . Consequently, switches 5 and 6 are switched on and off respectively and output A rises. Then, output C of comparator 9 returns from the high level to the low level instantaneously, but FF7 is not influenced. At time t3, if input signal IN is in phase with output signal OUT of voltage control oscillator VCO, output B of lock detector 11 rises in level. Consequently, outputs E and F of FF7 are both held at the low level and switches 5 and 6 are turned off, so that PLL circuit 10 will be in normal operation to maintain the lock state, eliminating the need for a capacitor.
JP14621379A 1979-11-12 1979-11-12 Leading-in sweep device of pll circuit Granted JPS5669934A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14621379A JPS5669934A (en) 1979-11-12 1979-11-12 Leading-in sweep device of pll circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14621379A JPS5669934A (en) 1979-11-12 1979-11-12 Leading-in sweep device of pll circuit

Publications (2)

Publication Number Publication Date
JPS5669934A true JPS5669934A (en) 1981-06-11
JPH0530089B2 JPH0530089B2 (en) 1993-05-07

Family

ID=15402661

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14621379A Granted JPS5669934A (en) 1979-11-12 1979-11-12 Leading-in sweep device of pll circuit

Country Status (1)

Country Link
JP (1) JPS5669934A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62188426A (en) * 1986-02-13 1987-08-18 Yokogawa Electric Corp Signal generation circuit
JPS63173928U (en) * 1987-04-30 1988-11-11
JPS6422113A (en) * 1987-07-17 1989-01-25 Sony Corp Pll circuit
US5204634A (en) * 1991-03-08 1993-04-20 Alcatel Espace Phase-locked loop demodulator having loop filter controlled by lock detector
EP0863616A1 (en) * 1997-03-06 1998-09-09 Texas Instruments Incorporated Phase locked loop

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS523365A (en) * 1975-06-26 1977-01-11 Mitsubishi Electric Corp Phase synchroneous circuit
JPS5443603A (en) * 1977-09-13 1979-04-06 Nec Corp High-speed catching device for receiving signal

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS523365A (en) * 1975-06-26 1977-01-11 Mitsubishi Electric Corp Phase synchroneous circuit
JPS5443603A (en) * 1977-09-13 1979-04-06 Nec Corp High-speed catching device for receiving signal

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62188426A (en) * 1986-02-13 1987-08-18 Yokogawa Electric Corp Signal generation circuit
JPS63173928U (en) * 1987-04-30 1988-11-11
JPS6422113A (en) * 1987-07-17 1989-01-25 Sony Corp Pll circuit
US5204634A (en) * 1991-03-08 1993-04-20 Alcatel Espace Phase-locked loop demodulator having loop filter controlled by lock detector
EP0863616A1 (en) * 1997-03-06 1998-09-09 Texas Instruments Incorporated Phase locked loop
US6031427A (en) * 1997-03-06 2000-02-29 Texas Instruments Incorporated System for sweeping a phase lock loop into lock with automatic initiation and shutdown

Also Published As

Publication number Publication date
JPH0530089B2 (en) 1993-05-07

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