JPS5542478A - Synthesizer fm receiver - Google Patents

Synthesizer fm receiver

Info

Publication number
JPS5542478A
JPS5542478A JP11694678A JP11694678A JPS5542478A JP S5542478 A JPS5542478 A JP S5542478A JP 11694678 A JP11694678 A JP 11694678A JP 11694678 A JP11694678 A JP 11694678A JP S5542478 A JPS5542478 A JP S5542478A
Authority
JP
Japan
Prior art keywords
sweep
signal
circuit
detection circuit
detects
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
JP11694678A
Other languages
Japanese (ja)
Other versions
JPS5821448B2 (en
Inventor
Fumitake Suzuki
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.)
Akai Electric Co Ltd
Original Assignee
Akai 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 Akai Electric Co Ltd filed Critical Akai Electric Co Ltd
Priority to JP11694678A priority Critical patent/JPS5821448B2/en
Publication of JPS5542478A publication Critical patent/JPS5542478A/en
Publication of JPS5821448B2 publication Critical patent/JPS5821448B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Superheterodyne Receivers (AREA)

Abstract

PURPOSE: To prevent the reception of a signal of low quality by separating a high- frequency component generated due to interference outside the range of hearing from a signal after FM detection, and then by continuing a sweep while this component is detected.
CONSTITUTION: A frequency sweep is made at a variable division ratio of a divider and when a receiver receives a signal in this sweep, the sweep is stopped. For the purpose, direct-current voltage detection circuit 8 which detects the output direct- current voltage of FM detection circuit, 2 carrier detection circuit 5 (composed of transistor Q1, Schmitt circuit 7, etc.) which detects a carrier output extracted from intermediate-frequency amplifier circuit 1, and high-frequency component detection circuit 9 (composed of transistor Q5, high-pass filter 10 and Schmitt circuit 12) which detects the level of a high-frequency component included in an output signal from circuit 2 are provided and only when outputs of circuits 5, 8 and 9 are all held at low levels, the sweep stops. Therefore, the sweep never stops in case of a shift in tuning or interference, so that reception of a low-quality signal can be prevented.
COPYRIGHT: (C)1980,JPO&Japio
JP11694678A 1978-09-21 1978-09-21 synthesizer fm receiver Expired JPS5821448B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11694678A JPS5821448B2 (en) 1978-09-21 1978-09-21 synthesizer fm receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11694678A JPS5821448B2 (en) 1978-09-21 1978-09-21 synthesizer fm receiver

Publications (2)

Publication Number Publication Date
JPS5542478A true JPS5542478A (en) 1980-03-25
JPS5821448B2 JPS5821448B2 (en) 1983-04-30

Family

ID=14699633

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11694678A Expired JPS5821448B2 (en) 1978-09-21 1978-09-21 synthesizer fm receiver

Country Status (1)

Country Link
JP (1) JPS5821448B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS612414A (en) * 1984-06-14 1986-01-08 Rohm Co Ltd Automatic channel selection stopping signal circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS612414A (en) * 1984-06-14 1986-01-08 Rohm Co Ltd Automatic channel selection stopping signal circuit

Also Published As

Publication number Publication date
JPS5821448B2 (en) 1983-04-30

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