JPS55135428A - Pll frequency synthesizer device - Google Patents

Pll frequency synthesizer device

Info

Publication number
JPS55135428A
JPS55135428A JP4336479A JP4336479A JPS55135428A JP S55135428 A JPS55135428 A JP S55135428A JP 4336479 A JP4336479 A JP 4336479A JP 4336479 A JP4336479 A JP 4336479A JP S55135428 A JPS55135428 A JP S55135428A
Authority
JP
Japan
Prior art keywords
divider
oscillator
circuit
control data
output end
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
JP4336479A
Other languages
Japanese (ja)
Inventor
Tadashi Kojima
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP4336479A priority Critical patent/JPS55135428A/en
Publication of JPS55135428A publication Critical patent/JPS55135428A/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
    • H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
    • H03L7/18—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop
    • H03L7/183—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between fixed numbers or the frequency divider dividing by a fixed number

Landscapes

  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Superheterodyne Receivers (AREA)

Abstract

PURPOSE:To obtain a synthesizer device which features the simple circuit constitution and has no trouble at all in terms of the substantial working property, by obtaining the division ratio control data of the programable divider via the divider circuit. CONSTITUTION:The output end of voltage control oscillator 31 is connected to programable divider 33 along with output terminal 32, and the output end of divider 33 is connected to one end of the input of phase comparator 34. At the same time, the other input end of comparator 34 is connected to the output end of standard oscillator 35 via selector 36, and the output end of oscillator 35 is connected to the input end of oscillator 31 via low pass filter 37. On the other hand, the control data is supplied to the division ratio control data input end of divider 33 via divider circuit 39, and at the same time detecting circuit 38 detects whether the minimum digit data among the control data features 0, 5 or other numbers. Then the 1st- 3rd detection signals are supplied to the control ends of selector 36 and circuit 39 each.
JP4336479A 1979-04-10 1979-04-10 Pll frequency synthesizer device Pending JPS55135428A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4336479A JPS55135428A (en) 1979-04-10 1979-04-10 Pll frequency synthesizer device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4336479A JPS55135428A (en) 1979-04-10 1979-04-10 Pll frequency synthesizer device

Publications (1)

Publication Number Publication Date
JPS55135428A true JPS55135428A (en) 1980-10-22

Family

ID=12661790

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4336479A Pending JPS55135428A (en) 1979-04-10 1979-04-10 Pll frequency synthesizer device

Country Status (1)

Country Link
JP (1) JPS55135428A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57164407A (en) * 1981-03-31 1982-10-09 Arupain Kk Pll oscillating circuit
JPS59219027A (en) * 1983-05-27 1984-12-10 Yaesu Musen Co Ltd Pll circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57164407A (en) * 1981-03-31 1982-10-09 Arupain Kk Pll oscillating circuit
JPH0546034B2 (en) * 1981-03-31 1993-07-12 Alpine Electronics Inc
JPS59219027A (en) * 1983-05-27 1984-12-10 Yaesu Musen Co Ltd Pll circuit

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