ES8300421A1 - Digital phase detector - Google Patents

Digital phase detector

Info

Publication number
ES8300421A1
ES8300421A1 ES507433A ES507433A ES8300421A1 ES 8300421 A1 ES8300421 A1 ES 8300421A1 ES 507433 A ES507433 A ES 507433A ES 507433 A ES507433 A ES 507433A ES 8300421 A1 ES8300421 A1 ES 8300421A1
Authority
ES
Spain
Prior art keywords
phase detector
reference signal
phase
circuit
signal
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.)
Expired
Application number
ES507433A
Other languages
Spanish (es)
Other versions
ES507433A0 (en
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.)
Nokia Spain SA
Original Assignee
Alcatel Espana SA
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 Alcatel Espana SA filed Critical Alcatel Espana SA
Publication of ES8300421A1 publication Critical patent/ES8300421A1/en
Publication of ES507433A0 publication Critical patent/ES507433A0/en
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
    • H03L7/085—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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D13/00—Circuits for comparing the phase or frequency of two mutually-independent oscillations
    • H03D13/003—Circuits for comparing the phase or frequency of two mutually-independent oscillations in which both oscillations are converted by logic means into pulses which are applied to filtering or integrating means
    • H03D13/004—Circuits for comparing the phase or frequency of two mutually-independent oscillations in which both oscillations are converted by logic means into pulses which are applied to filtering or integrating means the logic means delivering pulses at more than one terminal, e.g. up and down pulses

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Manipulation Of Pulses (AREA)

Abstract

In a phase monitoring circuit, which for a phase-locked-loop regulating system uses only one digital phase detector, to which a reference signal and a comparison signal are fed, and in which an output signal corresponding to the phase difference is output to control a voltage-controlled oscillator, there is the danger that, after a failure or an interruption of the reference signal, the phase detector, in certain cases, does not set the phase difference after restart to zero, but to 2 pi . To avoid this, a correction circuit (KS) is connected in series before the phase detector and delays connecting the signals through to the phase detector after the reference signal restarts in such a way that the falling edge of the reference signal is fed to the phase detector simultaneously with or delayed after the falling edge of the comparison signal. The correction circuit (KS) includes a retriggerable monostable flip flop circuit (MF) to monitor the reference signal (R), a gate circuit (G3) with inputs for the output signal (Q) of the monostable flipflop circuit (MF) and the comparison signal (V), a multivibrator consisting of two gates (G4, G5), an inverter (G6) and two through-connecting gates (G1, G2). One input of one of the through-connecting gates (G1) is connected to a capacitor (C1).
ES507433A 1980-11-28 1981-11-25 A DIGITAL PHASE DETECTOR. Granted ES507433A0 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19803044835 DE3044835C2 (en) 1980-11-28 1980-11-28 Digital phase detector

Publications (2)

Publication Number Publication Date
ES8300421A1 true ES8300421A1 (en) 1982-11-01
ES507433A0 ES507433A0 (en) 1982-11-01

Family

ID=6117795

Family Applications (1)

Application Number Title Priority Date Filing Date
ES507433A Granted ES507433A0 (en) 1980-11-28 1981-11-25 A DIGITAL PHASE DETECTOR.

Country Status (6)

Country Link
JP (1) JPS57118445A (en)
CH (1) CH656758A5 (en)
DE (1) DE3044835C2 (en)
ES (1) ES507433A0 (en)
FI (1) FI73103C (en)
GR (1) GR76352B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3544675A1 (en) * 1985-12-18 1987-06-25 Philips Patentverwaltung CIRCUIT ARRANGEMENT FOR CONTROLLING A FREQUENCY-DEPENDENT OSCILLATOR
JPH04250712A (en) * 1991-01-25 1992-09-07 Toshiba Corp Semiconductor integrated circuit
US5340159A (en) * 1991-07-12 1994-08-23 The Standard Register Company Varying tone security document

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3921095A (en) * 1974-11-14 1975-11-18 Hewlett Packard Co Startable phase-locked loop oscillator
US4237423A (en) * 1978-12-08 1980-12-02 Rca Corporation Digital phase detector
DE2856211A1 (en) * 1978-12-27 1980-07-03 Licentia Gmbh DIGITAL PHASE CONTROL WITH ONE AUXILIARY

Also Published As

Publication number Publication date
DE3044835A1 (en) 1982-06-03
CH656758A5 (en) 1986-07-15
FI73103C (en) 1987-08-10
GR76352B (en) 1984-08-06
JPS6347163B2 (en) 1988-09-20
JPS57118445A (en) 1982-07-23
ES507433A0 (en) 1982-11-01
FI813772L (en) 1982-05-29
DE3044835C2 (en) 1986-04-03
FI73103B (en) 1987-04-30

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 19970612