JPS55105442A - Phase synchronous circuit - Google Patents

Phase synchronous circuit

Info

Publication number
JPS55105442A
JPS55105442A JP1297579A JP1297579A JPS55105442A JP S55105442 A JPS55105442 A JP S55105442A JP 1297579 A JP1297579 A JP 1297579A JP 1297579 A JP1297579 A JP 1297579A JP S55105442 A JPS55105442 A JP S55105442A
Authority
JP
Japan
Prior art keywords
switch
phase synchronous
circuit
phase
control type
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
JP1297579A
Other languages
Japanese (ja)
Inventor
Takeo Onodera
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 JP1297579A priority Critical patent/JPS55105442A/en
Publication of JPS55105442A publication Critical patent/JPS55105442A/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
    • H03L7/10—Details of the phase-locked loop for assuring initial synchronisation or for broadening the capture range
    • H03L7/107—Details of the phase-locked loop for assuring initial synchronisation or for broadening the capture range using a variable transfer function for the loop, e.g. low pass filter having a variable bandwidth
    • H03L7/1075—Details of the phase-locked loop for assuring initial synchronisation or for broadening the capture range using a variable transfer function for the loop, e.g. low pass filter having a variable bandwidth by changing characteristics of the loop filter, e.g. changing the gain, changing the bandwidth

Landscapes

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

Abstract

PURPOSE:To realize the phase synchronization with the carrier even for the signals other than the TV signal by securing the function as the sample value control type synchronous system at the transmission time of the TV signal and the function as the continuous control type synchronous system otherwise each. CONSTITUTION:When switch 13 is set toward (A), the circuit functions as the sample value control type phase synchronous system. When switch 13 is set toward (B), the supply of the sample pulses is discontinued to gate circuit 3 and sample holding circuit 5 to secure the continuous action. At the same time, switch 13 also switches the transmission characteristics of loop filter 6' of the phase synchronous circuit. Thus the phase synchronous circuits for both the sampling control and the continuous control is realized by one phase synchronous circuit according to the purpose via the operation of switch 13.
JP1297579A 1979-02-07 1979-02-07 Phase synchronous circuit Pending JPS55105442A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1297579A JPS55105442A (en) 1979-02-07 1979-02-07 Phase synchronous circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1297579A JPS55105442A (en) 1979-02-07 1979-02-07 Phase synchronous circuit

Publications (1)

Publication Number Publication Date
JPS55105442A true JPS55105442A (en) 1980-08-13

Family

ID=11820222

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1297579A Pending JPS55105442A (en) 1979-02-07 1979-02-07 Phase synchronous circuit

Country Status (1)

Country Link
JP (1) JPS55105442A (en)

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