JPS5676639A - Synthesizer receiver - Google Patents

Synthesizer receiver

Info

Publication number
JPS5676639A
JPS5676639A JP15341379A JP15341379A JPS5676639A JP S5676639 A JPS5676639 A JP S5676639A JP 15341379 A JP15341379 A JP 15341379A JP 15341379 A JP15341379 A JP 15341379A JP S5676639 A JPS5676639 A JP S5676639A
Authority
JP
Japan
Prior art keywords
frequency
split
controlled oscillator
voltage controlled
switching
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
JP15341379A
Other languages
Japanese (ja)
Inventor
Tetsuo Takahashi
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.)
TRIO KENWOOD CORP
Kenwood KK
Original Assignee
TRIO KENWOOD CORP
Kenwood KK
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 TRIO KENWOOD CORP, Kenwood KK filed Critical TRIO KENWOOD CORP
Priority to JP15341379A priority Critical patent/JPS5676639A/en
Publication of JPS5676639A publication Critical patent/JPS5676639A/en
Pending 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
    • H03J5/24—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 a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection
    • H03J5/242—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 a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection used exclusively for band selection
    • H03J5/244—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 a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection used exclusively for band selection using electronic means

Landscapes

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

Abstract

PURPOSE:To improve the S/N by constituting the voltage controlled oscillator of a phase locked loop so that the self-running frequency is switchable to the frequency different from external signals. CONSTITUTION:A series circuit consisting of a capacitor 14 and a switching diode 15 and another series circuit consisting of a capacitor 16 and a switching diode 17 are connected in parallel with the tank circuit of a voltage controlled oscillator 3', and the on/off of diodes 15, 17 are controlled with external signal, and the entire socillating frequency range of the voltage controlled oscillator 3' corresponding to the range of reception frequency is split into four with a varactor diode 18 in the tank circuit 18 to switch the self-running frequencies f1-f4 corresponding to the oscillated frequency range to be split. Similarly, even at a high frequency amplifying stage 2' in varactor diode tuning, the entire reception frequency range is split into four switching.
JP15341379A 1979-11-27 1979-11-27 Synthesizer receiver Pending JPS5676639A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15341379A JPS5676639A (en) 1979-11-27 1979-11-27 Synthesizer receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15341379A JPS5676639A (en) 1979-11-27 1979-11-27 Synthesizer receiver

Publications (1)

Publication Number Publication Date
JPS5676639A true JPS5676639A (en) 1981-06-24

Family

ID=15561939

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15341379A Pending JPS5676639A (en) 1979-11-27 1979-11-27 Synthesizer receiver

Country Status (1)

Country Link
JP (1) JPS5676639A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59133738A (en) * 1983-01-20 1984-08-01 Yaesu Musen Co Ltd Pll synthesizer system
JPS59189357U (en) * 1983-06-01 1984-12-15 日立電子株式会社 wideband radio
JPS61135204A (en) * 1984-12-06 1986-06-23 Matsushita Electric Ind Co Ltd Local oscillation circuit
JPS6239916A (en) * 1985-08-14 1987-02-20 Akai Electric Co Ltd Pll circuit
JPS62198221A (en) * 1986-02-26 1987-09-01 Matsushita Electric Ind Co Ltd Frequency synthesizer
JPH0758637A (en) * 1993-08-13 1995-03-03 Nec Corp Frequency synthesizer

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59133738A (en) * 1983-01-20 1984-08-01 Yaesu Musen Co Ltd Pll synthesizer system
JPH055207B2 (en) * 1983-01-20 1993-01-21 Yaesu Musen Kk
JPS59189357U (en) * 1983-06-01 1984-12-15 日立電子株式会社 wideband radio
JPS61135204A (en) * 1984-12-06 1986-06-23 Matsushita Electric Ind Co Ltd Local oscillation circuit
JPS6239916A (en) * 1985-08-14 1987-02-20 Akai Electric Co Ltd Pll circuit
JPS62198221A (en) * 1986-02-26 1987-09-01 Matsushita Electric Ind Co Ltd Frequency synthesizer
JPH0758637A (en) * 1993-08-13 1995-03-03 Nec Corp Frequency synthesizer

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