JPS56160147A - Receiving device - Google Patents

Receiving device

Info

Publication number
JPS56160147A
JPS56160147A JP6381680A JP6381680A JPS56160147A JP S56160147 A JPS56160147 A JP S56160147A JP 6381680 A JP6381680 A JP 6381680A JP 6381680 A JP6381680 A JP 6381680A JP S56160147 A JPS56160147 A JP S56160147A
Authority
JP
Japan
Prior art keywords
division ratio
shift
value
digital
beat
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
JP6381680A
Other languages
Japanese (ja)
Inventor
Toru Shiono
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.)
Japan Radio Co Ltd
Original Assignee
Japan Radio 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 Japan Radio Co Ltd filed Critical Japan Radio Co Ltd
Priority to JP6381680A priority Critical patent/JPS56160147A/en
Publication of JPS56160147A publication Critical patent/JPS56160147A/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 increase the stability of not only the frequency but the degree of IF shift, by forming a local oscillator and a beat oscillator with different frequency synthesizers and giving an equal shift to the division ratio of a variable divider contained in each of the two oscillators mentioned above. CONSTITUTION:The division ratio set value R for local oscillation synthesizer is fed to a display device 12 and a digital operator 11; and the division ratio set value S for beat oscillation synthesizer is set to a digital operator 15. An IF shift knob is operated to generate a pulse train from a rotary pulse generator 14, and the pulse train is totalized by an up-down counter 13 to produce the digital value DELTAS corresponding to the number of IF shift pulses. The value 8 is applied to the operators 11 and 15, and the output of these operators become S and S+DELTAS each. Accordingly the division ratio becomes equal between the variable dividers incorporated in the frequency synthesizers 50 and 80 respectively.
JP6381680A 1980-05-14 1980-05-14 Receiving device Pending JPS56160147A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6381680A JPS56160147A (en) 1980-05-14 1980-05-14 Receiving device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6381680A JPS56160147A (en) 1980-05-14 1980-05-14 Receiving device

Publications (1)

Publication Number Publication Date
JPS56160147A true JPS56160147A (en) 1981-12-09

Family

ID=13240264

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6381680A Pending JPS56160147A (en) 1980-05-14 1980-05-14 Receiving device

Country Status (1)

Country Link
JP (1) JPS56160147A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5390709A (en) * 1977-01-20 1978-08-09 Torio Kk Device for shifting frequency

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5390709A (en) * 1977-01-20 1978-08-09 Torio Kk Device for shifting frequency

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