JPS56136041A - Frequency synthesizer system receiver - Google Patents

Frequency synthesizer system receiver

Info

Publication number
JPS56136041A
JPS56136041A JP3920880A JP3920880A JPS56136041A JP S56136041 A JPS56136041 A JP S56136041A JP 3920880 A JP3920880 A JP 3920880A JP 3920880 A JP3920880 A JP 3920880A JP S56136041 A JPS56136041 A JP S56136041A
Authority
JP
Japan
Prior art keywords
circuit
multiplying
oscillator
frequency
lock
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
JP3920880A
Other languages
Japanese (ja)
Inventor
Takeshi Sakai
Toru Akiyama
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.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo 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 Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP3920880A priority Critical patent/JPS56136041A/en
Publication of JPS56136041A publication Critical patent/JPS56136041A/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
    • H03J5/02—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)
  • Superheterodyne Receivers (AREA)

Abstract

PURPOSE:To shorten a lock-up time while simplifying a circuit by using one voltage-controlled oscillator in common to more than one band. CONSTITUTION:Signals of frequencies obtained by multiplying oscillation output fv' of voltage-controlled oscillator 12' by multiplying circuits 18a and 18s with multiplication ratios Ma and Ms are applied to mixing circuits 2a' and 2s' by way of LPFs 19a and 19s. On the other hand, output fv' of oscillator 12' is multiplied by M at multiplying circuit 20 and, after being frequency-divided by programmable frequency dividing circuit 13', compared with reference frequency fr' by phase comparing circuit 14'. In this circuit constitution, setting multiplication ratios Ma Ms and properly makes it possible to use oscillator 12' without reference to the band. In Europe, etc., reference frequency fr' can be set high, so that the lock-up time can be shortened.
JP3920880A 1980-03-26 1980-03-26 Frequency synthesizer system receiver Pending JPS56136041A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3920880A JPS56136041A (en) 1980-03-26 1980-03-26 Frequency synthesizer system receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3920880A JPS56136041A (en) 1980-03-26 1980-03-26 Frequency synthesizer system receiver

Publications (1)

Publication Number Publication Date
JPS56136041A true JPS56136041A (en) 1981-10-23

Family

ID=12546710

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3920880A Pending JPS56136041A (en) 1980-03-26 1980-03-26 Frequency synthesizer system receiver

Country Status (1)

Country Link
JP (1) JPS56136041A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6196837A (en) * 1984-10-17 1986-05-15 Matsushita Electric Ind Co Ltd Phase locked loop receiver
JPS61281627A (en) * 1985-06-06 1986-12-12 Matsushita Electric Ind Co Ltd Receiver
JPS62213325A (en) * 1986-03-13 1987-09-19 Yaesu Musen Co Ltd Radio communication equipment
US6337976B1 (en) 1997-12-18 2002-01-08 Nec Corporation Selective-calling radio receiver using direct conversion method
WO2006075779A1 (en) * 2005-01-12 2006-07-20 Nec Corporation Radio communication equipment

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6196837A (en) * 1984-10-17 1986-05-15 Matsushita Electric Ind Co Ltd Phase locked loop receiver
JPS61281627A (en) * 1985-06-06 1986-12-12 Matsushita Electric Ind Co Ltd Receiver
JPS62213325A (en) * 1986-03-13 1987-09-19 Yaesu Musen Co Ltd Radio communication equipment
US6337976B1 (en) 1997-12-18 2002-01-08 Nec Corporation Selective-calling radio receiver using direct conversion method
WO2006075779A1 (en) * 2005-01-12 2006-07-20 Nec Corporation Radio communication equipment

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