JPS58153427A - Fm receiver - Google Patents

Fm receiver

Info

Publication number
JPS58153427A
JPS58153427A JP3453982A JP3453982A JPS58153427A JP S58153427 A JPS58153427 A JP S58153427A JP 3453982 A JP3453982 A JP 3453982A JP 3453982 A JP3453982 A JP 3453982A JP S58153427 A JPS58153427 A JP S58153427A
Authority
JP
Japan
Prior art keywords
signal
frequency
circuit
frequency signal
modulation
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
JP3453982A
Other languages
Japanese (ja)
Inventor
Shigeatsu Asari
栄厚 浅利
Eishin Kakihara
柿原　英信
Toshiki Murakami
寿城 村上
Tsukasa Yamazaki
山崎　士
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP3453982A priority Critical patent/JPS58153427A/en
Publication of JPS58153427A publication Critical patent/JPS58153427A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/26—Circuits for superheterodyne receivers

Abstract

PURPOSE:To extract a required signal different from a broadcasting signal without providing an alternation switch to a low frequency signal circuit, by providing a frequency modulating circuit between a local oscillating circuit and a frequency mixing circuit to perform FM modulation by an audible frequency signal. CONSTITUTION:An FM signal received by an antenna 1 and amplified by a high frequency amplifier 2 is mixed with a signal from a local oscillator 4 by a mixer 3, and the mixed intermediate frequency signal is amplified by an amplifier 6 and demodulated by a demodulator 7 to obtain a low frequency output. Since an FM modulator 5 is inserted between the local oscillator 4 and the frequency mixer 3, the intermediate frequency signal is superposed with a modulation signal by modulating the intermediate frequency signal with an audible frequency signal, and the audible frequency signal is taken out from an FM demodulator.

Description

【発明の詳細な説明】 本灸明はＦＭ受信機に関し、特に局部発振回路と同波数
混合回路の間に周波数変調回路を設けて可聴周波信号で
ＦＭ変調を行い、復調回路から可聴周波信号をとり出す
ようにしたＦＭ受信機に関する。Detailed Description of the Invention This invention relates to an FM receiver, in particular, a frequency modulation circuit is provided between a local oscillation circuit and a same wave number mixing circuit to perform FM modulation with an audio frequency signal, and the audio frequency signal is output from a demodulation circuit. This relates to an FM receiver that can be taken out.

従来、ＦＭ受信機で放送信号とは別の信号を出力する場
合、低周波信号回路を切り換えることにより受信信号以
外の信号を”とり出していた。Conventionally, when an FM receiver outputs a signal other than a broadcast signal, the signal other than the received signal was extracted by switching a low frequency signal circuit.

本発明は、低周波信号回路に切り換えスイッチを設けず
に、局部発振周波数をＦＭ変調し、’ＦＭ復調回路から
希望の信号を得ようとするものである。The present invention attempts to obtain a desired signal from the FM demodulation circuit by performing FM modulation on the local oscillation frequency without providing a changeover switch in the low frequency signal circuit.

図は本発明の実施例を示すものである。図において、ア
ンテナ１で受信され、高周波増幅器２で増幅されたＦＭ
信号は混合器３で局部発振器４がらの信号と混合されて
中間周波信号となり、中間周波増幅器６で増幅さｔ１復
調器７で復調されて低周波出力が得られる。The figure shows an embodiment of the invention. In the figure, FM received by antenna 1 and amplified by high frequency amplifier 2
The signal is mixed with the signal from the local oscillator 4 by the mixer 3 to become an intermediate frequency signal, which is amplified by the intermediate frequency amplifier 6 and demodulated by the t1 demodulator 7 to obtain a low frequency output.

本発明においては、局部発振器４と周波数混合器３との
間にＦＭ変調器５を挿入し、可聴周波信号で変調を行う
ことにより、中間周波信号に変調信号を重畳させて、Ｆ
Ｍ復調器から可聴周波信号をとり出すことができる。In the present invention, an FM modulator 5 is inserted between the local oscillator 4 and the frequency mixer 3, and the modulation signal is superimposed on the intermediate frequency signal by modulating the audio frequency signal.
An audio frequency signal can be extracted from the M demodulator.

以上のように本発明によれば、低周波信号回路に切り換
えスイッチを設けずに、放送信号とは別の希望する信号
を取り出すことができる。As described above, according to the present invention, a desired signal other than a broadcast signal can be extracted without providing a changeover switch in the low frequency signal circuit.

【図面の簡単な説明】[Brief explanation of the drawing]

図は本発明のＦＭ受信機の構成・を示すブロック図であ
る。− １・・・・・・・・・アンテナ、　２・・・・・叩高周
波増幅器、３・・・・・・・・・混合器、　４・・・・
・囲周部発振器、５・・・・・・・・・ＦＭ変調器、　
６・・・叩・中間周波増幅器、７・・・・・・・・・復
調器。 特許出願人　松下電器産業株式会社The figure is a block diagram showing the configuration of the FM receiver of the present invention. - 1...Antenna, 2...High frequency amplifier, 3...Mixer, 4...
・Surrounding oscillator, 5...FM modulator,
6... Beat/intermediate frequency amplifier, 7... Demodulator. Patent applicant Matsushita Electric Industrial Co., Ltd.

Claims (1)

【特許請求の範囲】[Claims] スーパーヘテロダイン方式を用いたＦＭ受信機において
、局部発振回路と周波数混合回路の間に周波数変調回路
を備え、可聴周波信号でＦＭ変調を行い、中間周波段後
の周波数変調復調回路から変調波信号をとり出すことを
特徴とするＦＭ受信機。An FM receiver using the superheterodyne system includes a frequency modulation circuit between a local oscillation circuit and a frequency mixing circuit, performs FM modulation with an audio frequency signal, and outputs a modulated wave signal from a frequency modulation demodulation circuit after an intermediate frequency stage. An FM receiver characterized by being able to be taken out.
JP3453982A 1982-03-06 1982-03-06 Fm receiver Pending JPS58153427A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3453982A JPS58153427A (en) 1982-03-06 1982-03-06 Fm receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3453982A JPS58153427A (en) 1982-03-06 1982-03-06 Fm receiver

Publications (1)

Publication Number Publication Date
JPS58153427A true JPS58153427A (en) 1983-09-12

Family

ID=12417092

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3453982A Pending JPS58153427A (en) 1982-03-06 1982-03-06 Fm receiver

Country Status (1)

Country Link
JP (1) JPS58153427A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2571180A1 (en) * 1984-09-28 1986-04-04 Portenseigne Antenna aiming device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2571180A1 (en) * 1984-09-28 1986-04-04 Portenseigne Antenna aiming device

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