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JPS568927A - Automatic digital phase control circuit - Google Patents

Automatic digital phase control circuit

Info

Publication number
JPS568927A
JPS568927A JP8416479A JP8416479A JPS568927A JP S568927 A JPS568927 A JP S568927A JP 8416479 A JP8416479 A JP 8416479A JP 8416479 A JP8416479 A JP 8416479A JP S568927 A JPS568927 A JP S568927A
Authority
JP
Japan
Prior art keywords
apc
loop gain
control circuit
signal
phase control
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
JP8416479A
Other languages
Japanese (ja)
Other versions
JPS6355252B2 (en
Inventor
Toshihiko Ryu
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP8416479A priority Critical patent/JPS568927A/en
Publication of JPS568927A publication Critical patent/JPS568927A/en
Publication of JPS6355252B2 publication Critical patent/JPS6355252B2/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
    • H03L7/085—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal

Landscapes

  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)

Abstract

PURPOSE:To improve drawing characteristics and tracking characteristics by changing over the operation ranges of a loop gain and control voltage through a gate. CONSTITUTION:In normal operation, quasi-phase control signal APC controls voltage control oscillator VCO4 via FF1. In abnormal operation, the output voltage of FF1 has an offset generated at level ''H'' or ''L'' and arithmetic control circuit 5 sends control signal CONT to FF2. Then, FF2 fetches the quasi-APC-signal through gates G3-G5. As a result, the signals applied to VCO are outputs from FF! and FF2, which is equivalent to an increase in loop gain. In accordance with the values of resistances R1 and R2 provided to the outputs of FF1 and 2, the proportion of the contribution of each FF to the APC signal can easily be controlled and making R2 less than R1 specially provides a decrease in normal loop gain.
JP8416479A 1979-07-03 1979-07-03 Automatic digital phase control circuit Granted JPS568927A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8416479A JPS568927A (en) 1979-07-03 1979-07-03 Automatic digital phase control circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8416479A JPS568927A (en) 1979-07-03 1979-07-03 Automatic digital phase control circuit

Publications (2)

Publication Number Publication Date
JPS568927A true JPS568927A (en) 1981-01-29
JPS6355252B2 JPS6355252B2 (en) 1988-11-01

Family

ID=13822847

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8416479A Granted JPS568927A (en) 1979-07-03 1979-07-03 Automatic digital phase control circuit

Country Status (1)

Country Link
JP (1) JPS568927A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0284453U (en) * 1989-06-07 1990-06-29
JPH0560903U (en) * 1992-01-28 1993-08-10 菩提哉 中島 Vehicles that are attached to legs, grades, and wheels.

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4848056A (en) * 1971-10-20 1973-07-07

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4848056A (en) * 1971-10-20 1973-07-07

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0284453U (en) * 1989-06-07 1990-06-29
JPH0560903U (en) * 1992-01-28 1993-08-10 菩提哉 中島 Vehicles that are attached to legs, grades, and wheels.

Also Published As

Publication number Publication date
JPS6355252B2 (en) 1988-11-01

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