JPS5646324A - Fm tuner circuit - Google Patents

Fm tuner circuit

Info

Publication number
JPS5646324A
JPS5646324A JP12276079A JP12276079A JPS5646324A JP S5646324 A JPS5646324 A JP S5646324A JP 12276079 A JP12276079 A JP 12276079A JP 12276079 A JP12276079 A JP 12276079A JP S5646324 A JPS5646324 A JP S5646324A
Authority
JP
Japan
Prior art keywords
circuit
frequency
detection
output
oscillation
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
JP12276079A
Other languages
Japanese (ja)
Other versions
JPS6030448B2 (en
Inventor
Junichi Hikita
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.)
Rohm Co Ltd
Original Assignee
Rohm Co Ltd
Toyo Electronics Industry 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 Rohm Co Ltd, Toyo Electronics Industry Corp filed Critical Rohm Co Ltd
Priority to JP12276079A priority Critical patent/JPS6030448B2/en
Publication of JPS5646324A publication Critical patent/JPS5646324A/en
Publication of JPS6030448B2 publication Critical patent/JPS6030448B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
    • H03J7/02—Automatic frequency control

Landscapes

  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

PURPOSE:To enable the FM detection with high fidelity, by broad FM detection band, through the control of oscillation frequency of the local oscillation circuit with the output frequency component, in the FM detection circuit using the solid-state resonators such as ceramic filters. CONSTITUTION:The output of the local oscillation circuit 8 is fed to the frequency mixing circuit 6, and the circuit 8 oscillates a given frequency to produce IF and the output frequency can be controlled with the control input. The voltage controlled oscillator VCO is used for the local oscillation circuit 8, in which the output audio frequency component is used for the control input. Further, the oscillation frequency controlled with the output audio frequency is mixed with the reception frequency at the circuit 6, to produce IF which is the difference of the two and is input to the IF amplifier circuit 10 at the next stage. Thus, the control of the oscillation frequency component in the FM detection circuit reduces the frequency shift at the input side of the FM detection circuit, allowing to make broad the detection band for FM detection with high fidelity.
JP12276079A 1979-09-25 1979-09-25 FM tuner circuit Expired JPS6030448B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12276079A JPS6030448B2 (en) 1979-09-25 1979-09-25 FM tuner circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12276079A JPS6030448B2 (en) 1979-09-25 1979-09-25 FM tuner circuit

Publications (2)

Publication Number Publication Date
JPS5646324A true JPS5646324A (en) 1981-04-27
JPS6030448B2 JPS6030448B2 (en) 1985-07-16

Family

ID=14843927

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12276079A Expired JPS6030448B2 (en) 1979-09-25 1979-09-25 FM tuner circuit

Country Status (1)

Country Link
JP (1) JPS6030448B2 (en)

Also Published As

Publication number Publication date
JPS6030448B2 (en) 1985-07-16

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