JPS55121710A - Short-medium wave conversion system - Google Patents

Short-medium wave conversion system

Info

Publication number
JPS55121710A
JPS55121710A JP2853479A JP2853479A JPS55121710A JP S55121710 A JPS55121710 A JP S55121710A JP 2853479 A JP2853479 A JP 2853479A JP 2853479 A JP2853479 A JP 2853479A JP S55121710 A JPS55121710 A JP S55121710A
Authority
JP
Japan
Prior art keywords
divider
pll
pass filter
short wave
short
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
JP2853479A
Other languages
Japanese (ja)
Inventor
Takao Miyazaki
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.)
Faurecia Clarion Electronics Co Ltd
Original Assignee
Clarion 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 Clarion Co Ltd filed Critical Clarion Co Ltd
Priority to JP2853479A priority Critical patent/JPS55121710A/en
Publication of JPS55121710A publication Critical patent/JPS55121710A/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)
  • Superheterodyne Receivers (AREA)

Abstract

PURPOSE:To realize the conversion of the optional frequency for the medium wave or the like, by receiving the desired short wave signal after selection of the division ratio of the 1st PLL and then selecting the 2nd PLL connected to the mixing circuit. CONSTITUTION:The short wave which is supplied to antenna AT is applied to RF step 1 to secure the tuning. The 1st PLL synthesizer consists of oscillator 2, phase detector 3, low pass filter 4, VCO1 and 1/N divider 6. And the tuning is obtained for the optional short wave signal by varying N of divider 6. Then the mixing is given to the output of VCO2 and 1 through mixing circuit 12, and only the differential component is made to pass via band pass filter 13. And the frequency can be converted by varying the division ratio of the 2nd PLL synthesizer consisting of oscillator 7, phase detector 8, low pass filter 9, VCO2, 1/N divider 14 and others.
JP2853479A 1979-03-12 1979-03-12 Short-medium wave conversion system Pending JPS55121710A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2853479A JPS55121710A (en) 1979-03-12 1979-03-12 Short-medium wave conversion system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2853479A JPS55121710A (en) 1979-03-12 1979-03-12 Short-medium wave conversion system

Publications (1)

Publication Number Publication Date
JPS55121710A true JPS55121710A (en) 1980-09-19

Family

ID=12251326

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2853479A Pending JPS55121710A (en) 1979-03-12 1979-03-12 Short-medium wave conversion system

Country Status (1)

Country Link
JP (1) JPS55121710A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1984004637A1 (en) * 1983-05-16 1984-11-22 Motorola Inc A receiver system for eliminating self-quieting spurious responses
US4512035A (en) * 1983-05-16 1985-04-16 Motorola, Inc. Method of programming a synthesizer ROM for elimination of receiver self-quieting

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1984004637A1 (en) * 1983-05-16 1984-11-22 Motorola Inc A receiver system for eliminating self-quieting spurious responses
US4512035A (en) * 1983-05-16 1985-04-16 Motorola, Inc. Method of programming a synthesizer ROM for elimination of receiver self-quieting
EP0144394A1 (en) * 1983-05-16 1985-06-19 Motorola Inc A receiver system for eliminating self-quieting spurious responses.
EP0144394B1 (en) * 1983-05-16 1989-11-15 Motorola, Inc. A receiver system for eliminating self-quieting spurious responses

Similar Documents

Publication Publication Date Title
EP0306249A3 (en) Frequency synthesizer
ATE9424T1 (en) RECEPTION SYSTEM.
CA2114984A1 (en) Wide Band, Low-Noise, Fine Step Tuning, Phase Locked Loop Frequency Synthesizer
JPS54139316A (en) Am ssb transmitter/receiver
JPS5612129A (en) Synthesizer type receiver
JPS55121710A (en) Short-medium wave conversion system
JPS55110424A (en) Synthesizer receiver
JPS5680936A (en) Multiband receiver
JPS5612133A (en) Synthesizer type receiver
JPS5769927A (en) Pll synthesizer receiver
JPS5516532A (en) Automatic tuning radio set
JPS5676640A (en) Receiver of frequency synthesizer system
JPS561630A (en) Broadcast receiver
JPS54111742A (en) Frequency production system
JPS5333038A (en) Phase synchronizing oscillator
JPS52127737A (en) Oscillation circuit
JPS54118759A (en) Synthesized oscillator for radio device
JPS55118234A (en) Fm receiver
JPS54154211A (en) Local oscillation circuit
JPS5730425A (en) Channel selector
JPS5464962A (en) Reference carrier regenerator circuit
GB912607A (en) Improvements in frequency stabilised radio oscillation generators
JPS55166348A (en) Multi-channel radio transmitter/receiver
JPS54122914A (en) Radio receiver of pll frequency synthesizer system
JPS5694846A (en) Phase-locked loop type transmitter/receiver