JPS5652924A - Tuning circuit - Google Patents

Tuning circuit

Info

Publication number
JPS5652924A
JPS5652924A JP12908079A JP12908079A JPS5652924A JP S5652924 A JPS5652924 A JP S5652924A JP 12908079 A JP12908079 A JP 12908079A JP 12908079 A JP12908079 A JP 12908079A JP S5652924 A JPS5652924 A JP S5652924A
Authority
JP
Japan
Prior art keywords
current
resonance frequency
resonance
gradually
controlling
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
JP12908079A
Other languages
Japanese (ja)
Inventor
Tadashi Kosuge
Yukio Munakata
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.)
Pioneer Corp
Original Assignee
Pioneer Electronic Corp
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 Pioneer Electronic Corp filed Critical Pioneer Electronic Corp
Priority to JP12908079A priority Critical patent/JPS5652924A/en
Publication of JPS5652924A publication Critical patent/JPS5652924A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J3/00—Continuous tuning
    • H03J3/02—Details
    • H03J3/16—Tuning without displacement of reactive element, e.g. by varying permeability

Landscapes

  • Superheterodyne Receivers (AREA)

Abstract

PURPOSE:To make it possible to remove a hysteresis phenomenon and to fix the resonance frequency to one against a controlling current value, by making it possible to execute the tuning operation by only one operation of increase or decrease of the controlling current. CONSTITUTION:In case the electric power source E for tuning is made high gradually and is resonated (tuned) to a desired frequency, the current controlling circuit A only performs a linear operation for generating the output voltage which is proportional to the input voltage. Accordingly, the winding L1 for resonance, and the resonance frequency of the resonance circuit of the capacitor C are varied gradually as the frequencies f1 f2 f3 in accordance with the currents i1 i2 i3 as shown in the figure. On the other hand, in case the resonance frequency is lowered in thd direction of f3 f2 f1, the current controlling circuit A operates, and lowers the current (i) to i1 once, so that it can reach a desired current value gradually after the fixed current (i) has been given. Accordingly, the current variation of the winding L3 for control always becomes one direction such as low to high currents, irrespective of the displacement direction of magnitude of the resonance frequency f0.
JP12908079A 1979-10-05 1979-10-05 Tuning circuit Pending JPS5652924A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12908079A JPS5652924A (en) 1979-10-05 1979-10-05 Tuning circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12908079A JPS5652924A (en) 1979-10-05 1979-10-05 Tuning circuit

Publications (1)

Publication Number Publication Date
JPS5652924A true JPS5652924A (en) 1981-05-12

Family

ID=15000577

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12908079A Pending JPS5652924A (en) 1979-10-05 1979-10-05 Tuning circuit

Country Status (1)

Country Link
JP (1) JPS5652924A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4945681U (en) * 1972-07-27 1974-04-22
JPS5063466A (en) * 1973-10-08 1975-05-29

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4945681U (en) * 1972-07-27 1974-04-22
JPS5063466A (en) * 1973-10-08 1975-05-29

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