JPS5619233A - Synthesizer tuner - Google Patents

Synthesizer tuner

Info

Publication number
JPS5619233A
JPS5619233A JP9474679A JP9474679A JPS5619233A JP S5619233 A JPS5619233 A JP S5619233A JP 9474679 A JP9474679 A JP 9474679A JP 9474679 A JP9474679 A JP 9474679A JP S5619233 A JPS5619233 A JP S5619233A
Authority
JP
Japan
Prior art keywords
frequency
output
becomes
comparison
lpf27
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
JP9474679A
Other languages
Japanese (ja)
Other versions
JPS6138886B2 (en
Inventor
Shigenobu Kimura
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.)
Nippon Gakki Co Ltd
Original Assignee
Nippon Gakki 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 Nippon Gakki Co Ltd filed Critical Nippon Gakki Co Ltd
Priority to JP9474679A priority Critical patent/JPS5619233A/en
Publication of JPS5619233A publication Critical patent/JPS5619233A/en
Publication of JPS6138886B2 publication Critical patent/JPS6138886B2/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)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Superheterodyne Receivers (AREA)

Abstract

PURPOSE:To eliminate the IF offset control even in case the central frequency of the intermediate frequency filter is shifted from the normal value, by giving the control to the oscillation frequency of the local oscillator according to the comparison result of the phase comparator. CONSTITUTION:Output signal fpc of programmable counter 18 is supplied to phase comparator 24 to receive the phase comparison with frequency fref (50kHz) of the reference signal given from reference signal generator 25 through frequency divider 26. And comparison output sa is supplied to LPF27. Then LPF27 produces control voltage VC based on output sa, and local oscillation frequency f0 of local oscillator 14 is controlled by voltage VC. The conditions under which frequency f0 becomes steady is in the state under which output sa becomes zero, i.e., signal fpc coincides with frequency fref (50kHz). Thus the frequency in that time becomes as f0=71.4MHz, and accordingly the reception frequency becomes to 82.1MHz. As a result, the broadcast station of the desired frequency of 82.1MHz can be received.
JP9474679A 1979-07-25 1979-07-25 Synthesizer tuner Granted JPS5619233A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9474679A JPS5619233A (en) 1979-07-25 1979-07-25 Synthesizer tuner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9474679A JPS5619233A (en) 1979-07-25 1979-07-25 Synthesizer tuner

Publications (2)

Publication Number Publication Date
JPS5619233A true JPS5619233A (en) 1981-02-23
JPS6138886B2 JPS6138886B2 (en) 1986-09-01

Family

ID=14118682

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9474679A Granted JPS5619233A (en) 1979-07-25 1979-07-25 Synthesizer tuner

Country Status (1)

Country Link
JP (1) JPS5619233A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57190426A (en) * 1981-05-18 1982-11-24 Matsushita Electric Ind Co Ltd Phase synchronizing loop controlling circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57190426A (en) * 1981-05-18 1982-11-24 Matsushita Electric Ind Co Ltd Phase synchronizing loop controlling circuit

Also Published As

Publication number Publication date
JPS6138886B2 (en) 1986-09-01

Similar Documents

Publication Publication Date Title
EP0369660A3 (en) Microwave frequency synthesizer with a frequency offset generator
JPS54102814A (en) Synthesizer receiver
US4303893A (en) Frequency synthesizer incorporating digital frequency translator
JPS57140034A (en) Phase synchronizing oscillator
JPS5619233A (en) Synthesizer tuner
JPS5613834A (en) Synthesizer tuner
EP0206247A3 (en) Pll frequency synthesizer
JPS5477004A (en) Channel selector
JPS5616330A (en) Synthesizer tuner
JPS5568742A (en) Phase lock oscillator circuit
JPS5571328A (en) Frequency synthesizer
JPS56169435A (en) Phase synchronization oscillator
JPS55118234A (en) Fm receiver
JPS5784629A (en) Channel selection circuit
JPS54121610A (en) Pll circuit of radio receiver
JPS57123718A (en) Electronic channel selector
JPS5769927A (en) Pll synthesizer receiver
JPS5483752A (en) Pll frequency synthesizer system
JPS56126333A (en) Receiver of frequency synthesizer system
JPS5784695A (en) Control circuit for transmission frequency
JPS56165424A (en) Oscillator
JPS5763936A (en) Phase-locked loop
JPS54154211A (en) Local oscillation circuit
JPS5483753A (en) Pll frequency synthesizer system
JPS54122914A (en) Radio receiver of pll frequency synthesizer system