JPS57152234A - Large-scale integrated circuit for pll tuning - Google Patents

Large-scale integrated circuit for pll tuning

Info

Publication number
JPS57152234A
JPS57152234A JP56036703A JP3670381A JPS57152234A JP S57152234 A JPS57152234 A JP S57152234A JP 56036703 A JP56036703 A JP 56036703A JP 3670381 A JP3670381 A JP 3670381A JP S57152234 A JPS57152234 A JP S57152234A
Authority
JP
Japan
Prior art keywords
output
circuit
switching signal
pulse width
phase
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
JP56036703A
Other languages
Japanese (ja)
Other versions
JPH029735B2 (en
Inventor
Osamu Nishijima
Makoto Yamatani
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electronics Corp
Matsushita Electric Industrial 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 Matsushita Electronics Corp, Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electronics Corp
Priority to JP56036703A priority Critical patent/JPS57152234A/en
Publication of JPS57152234A publication Critical patent/JPS57152234A/en
Publication of JPH029735B2 publication Critical patent/JPH029735B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J5/00—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner
    • H03J5/02—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with variable tuning element having a number of predetermined settings and adjustable to a desired one of these settings
    • H03J5/0245—Discontinuous tuning using an electrical variable impedance element, e.g. a voltage variable reactive diode, in which no corresponding analogue value either exists or is preset, i.e. the tuning information is only available in a digital form
    • H03J5/0272—Discontinuous tuning using an electrical variable impedance element, e.g. a voltage variable reactive diode, in which no corresponding analogue value either exists or is preset, i.e. the tuning information is only available in a digital form the digital values being used to preset a counter or a frequency divider in a phase locked loop, e.g. frequency synthesizer

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Superheterodyne Receivers (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)

Abstract

PURPOSE:To prevent the oscillation stop phenomenon of a voltage-controlled oscillator by measuring the output pulse width of a phase comparator and then generating a switching signal, and controlling the application state of a signal to an output circuit on the besis of the switching signal. CONSTITUTION:A PLL circuit consisting of a phase comparator 6 making a phase comparison between the output of a channel selection counter 5 and that of a reference counter 9, and an outputting circuit 1 generating an output signal to an LPF2 on the basis of the comparison result is integrated in a single semiconductor substrate. Then, a control part 12 generates a switching signal on the basis of pulse width information for measuring the pulse width of an out-of- phase pulse from the comparator 6. A control circuit 13 inputs the output pulse from the circuit 6, and the switching signal to generate a control output to the circuit 1.
JP56036703A 1981-03-13 1981-03-13 Large-scale integrated circuit for pll tuning Granted JPS57152234A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56036703A JPS57152234A (en) 1981-03-13 1981-03-13 Large-scale integrated circuit for pll tuning

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56036703A JPS57152234A (en) 1981-03-13 1981-03-13 Large-scale integrated circuit for pll tuning

Publications (2)

Publication Number Publication Date
JPS57152234A true JPS57152234A (en) 1982-09-20
JPH029735B2 JPH029735B2 (en) 1990-03-05

Family

ID=12477123

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56036703A Granted JPS57152234A (en) 1981-03-13 1981-03-13 Large-scale integrated circuit for pll tuning

Country Status (1)

Country Link
JP (1) JPS57152234A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61103935U (en) * 1984-12-11 1986-07-02
JPS63260320A (en) * 1987-04-17 1988-10-27 Sanyo Electric Co Ltd Pll circuit
JPS63260321A (en) * 1987-04-17 1988-10-27 Sanyo Electric Co Ltd Pll circuit

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51130187A (en) * 1975-05-07 1976-11-12 Furuno Electric Co Ltd Synchronizing equipment

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51130187A (en) * 1975-05-07 1976-11-12 Furuno Electric Co Ltd Synchronizing equipment

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61103935U (en) * 1984-12-11 1986-07-02
JPS63260320A (en) * 1987-04-17 1988-10-27 Sanyo Electric Co Ltd Pll circuit
JPS63260321A (en) * 1987-04-17 1988-10-27 Sanyo Electric Co Ltd Pll circuit

Also Published As

Publication number Publication date
JPH029735B2 (en) 1990-03-05

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