JPS5538710A - Phase lock loop circuit - Google Patents

Phase lock loop circuit

Info

Publication number
JPS5538710A
JPS5538710A JP11065278A JP11065278A JPS5538710A JP S5538710 A JPS5538710 A JP S5538710A JP 11065278 A JP11065278 A JP 11065278A JP 11065278 A JP11065278 A JP 11065278A JP S5538710 A JPS5538710 A JP S5538710A
Authority
JP
Japan
Prior art keywords
phase
signal
secure
control circuit
phase lock
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
JP11065278A
Other languages
Japanese (ja)
Inventor
Takashi Katayama
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP11065278A priority Critical patent/JPS5538710A/en
Publication of JPS5538710A publication Critical patent/JPS5538710A/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

Landscapes

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

Abstract

PURPOSE:To secure extraction of the signal featuring the 90 deg. phase difference to the basic wave signal regardless of the phase difference between the two signals by eliminating the range for the phase control. CONSTITUTION:In case signal (a) is selected by change-over switch 4, signal (a) passes through phase control circuit 5 and wave form conversion circuit 6. Then output signal (g) is compared with signal (b) for the phase at phase comparator 7, and thus the error voltage is supplied to phase control circuit 5 to secure the control so that the phase of signal (a) may feature the 90 deg. phase difference to signal (b). The error voltage, i.e., the output voltage of integrator 8 is monitored by window comparator 9. And when the phase lock becomes impossible, change-over switch control circuit 10 switches switch 4 in sequence to select signals (c)-(e) and to secure the phase lock.
JP11065278A 1978-09-11 1978-09-11 Phase lock loop circuit Pending JPS5538710A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11065278A JPS5538710A (en) 1978-09-11 1978-09-11 Phase lock loop circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11065278A JPS5538710A (en) 1978-09-11 1978-09-11 Phase lock loop circuit

Publications (1)

Publication Number Publication Date
JPS5538710A true JPS5538710A (en) 1980-03-18

Family

ID=14541086

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11065278A Pending JPS5538710A (en) 1978-09-11 1978-09-11 Phase lock loop circuit

Country Status (1)

Country Link
JP (1) JPS5538710A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5758213A (en) * 1980-09-24 1982-04-07 Sony Corp Phase controlling circuit
JPS5917637U (en) * 1982-07-22 1984-02-02 東光精機株式会社 phase shift control device
WO1988002577A1 (en) * 1986-10-03 1988-04-07 Nippon Telegraph And Telephone Corporation Timing signal delay circuit
JPS63310217A (en) * 1987-06-12 1988-12-19 Nitsuko Corp Digital phase locked loop circuit

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5758213A (en) * 1980-09-24 1982-04-07 Sony Corp Phase controlling circuit
JPS5917637U (en) * 1982-07-22 1984-02-02 東光精機株式会社 phase shift control device
WO1988002577A1 (en) * 1986-10-03 1988-04-07 Nippon Telegraph And Telephone Corporation Timing signal delay circuit
US4939677A (en) * 1986-10-03 1990-07-03 Nippon Telegraph And Telephone Corporation Timing-signal delay equipment
JPS63310217A (en) * 1987-06-12 1988-12-19 Nitsuko Corp Digital phase locked loop circuit

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