JPS5730422A - Closed loop type phase locked oscillator - Google Patents

Closed loop type phase locked oscillator

Info

Publication number
JPS5730422A
JPS5730422A JP10442380A JP10442380A JPS5730422A JP S5730422 A JPS5730422 A JP S5730422A JP 10442380 A JP10442380 A JP 10442380A JP 10442380 A JP10442380 A JP 10442380A JP S5730422 A JPS5730422 A JP S5730422A
Authority
JP
Japan
Prior art keywords
phase difference
difference
phase
potentials
controlled oscillator
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
JP10442380A
Other languages
Japanese (ja)
Inventor
Kazuo Isaka
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 JP10442380A priority Critical patent/JPS5730422A/en
Publication of JPS5730422A publication Critical patent/JPS5730422A/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
    • H03L7/089—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal the phase or frequency detector generating up-down pulses

Landscapes

  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)

Abstract

PURPOSE:To avoid the difference between the absolute values of currents of flowing in and out, when the absolute values of the phase difference detected are the same, by using a single power supply and transistors (TRs) of the same type. CONSTITUTION:The phase of a data pulse inputted to an input terminal 1 is compared with the phase of an output of a voltage controlled oscillator 4 and a phase difference detecting circuit 2 detects a lead phase difference A or lag phase difference B. The phase difference signal A or B turns on a TR8 or 9 to flow a current I1' or I2'. The currents I1', I2' pass respectively through low pass filters 3, 3a to be potentials C, D. The difference of the potentials C, D is amplified at a differential amplifier 5 and inputted to the voltage controlled oscillator 4. The frequency of the output pulse of the voltage controlled oscillator 4 is synchronized with the data pulse of the input terminal 1 according to the voltage difference of the potentials C, D.
JP10442380A 1980-07-31 1980-07-31 Closed loop type phase locked oscillator Pending JPS5730422A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10442380A JPS5730422A (en) 1980-07-31 1980-07-31 Closed loop type phase locked oscillator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10442380A JPS5730422A (en) 1980-07-31 1980-07-31 Closed loop type phase locked oscillator

Publications (1)

Publication Number Publication Date
JPS5730422A true JPS5730422A (en) 1982-02-18

Family

ID=14380275

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10442380A Pending JPS5730422A (en) 1980-07-31 1980-07-31 Closed loop type phase locked oscillator

Country Status (1)

Country Link
JP (1) JPS5730422A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4714900A (en) * 1985-11-21 1987-12-22 Nec Corporation Current output circuit having well-balanced output currents of opposite polarities

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5279856A (en) * 1975-12-23 1977-07-05 Ibm Phase synchronizier
JPS52137958A (en) * 1976-05-13 1977-11-17 Japan Radio Co Ltd Digital pll improving proximity spurious
JPS5323257A (en) * 1976-08-14 1978-03-03 Fujitsu Ltd Phase difference detection circuit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5279856A (en) * 1975-12-23 1977-07-05 Ibm Phase synchronizier
JPS52137958A (en) * 1976-05-13 1977-11-17 Japan Radio Co Ltd Digital pll improving proximity spurious
JPS5323257A (en) * 1976-08-14 1978-03-03 Fujitsu Ltd Phase difference detection circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4714900A (en) * 1985-11-21 1987-12-22 Nec Corporation Current output circuit having well-balanced output currents of opposite polarities

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