JPS5738033A - Fm receiver - Google Patents

Fm receiver

Info

Publication number
JPS5738033A
JPS5738033A JP11350480A JP11350480A JPS5738033A JP S5738033 A JPS5738033 A JP S5738033A JP 11350480 A JP11350480 A JP 11350480A JP 11350480 A JP11350480 A JP 11350480A JP S5738033 A JPS5738033 A JP S5738033A
Authority
JP
Japan
Prior art keywords
lowered
high band
cutoff frequency
band noise
signal
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
JP11350480A
Other languages
Japanese (ja)
Other versions
JPS6317257B2 (en
Inventor
Kazuo Watanabe
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP11350480A priority Critical patent/JPS5738033A/en
Publication of JPS5738033A publication Critical patent/JPS5738033A/en
Publication of JPS6317257B2 publication Critical patent/JPS6317257B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H40/00—Arrangements specially adapted for receiving broadcast information
    • H04H40/18—Arrangements characterised by circuits or components specially adapted for receiving
    • H04H40/27—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95
    • H04H40/36—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95 specially adapted for stereophonic broadcast receiving
    • H04H40/45—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95 specially adapted for stereophonic broadcast receiving for FM stereophonic broadcast systems receiving
    • H04H40/72—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95 specially adapted for stereophonic broadcast receiving for FM stereophonic broadcast systems receiving for noise suppression
    • 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
    • H04B1/1646—Circuits adapted for the reception of stereophonic signals

Abstract

PURPOSE:To improve the S/N by lowering the stereo separation degree and the cut- off frequency of LPF provided at the output side of a stereo demodulation circuit, through a noise detection signal based on the strength of received electric field and high band noise component. CONSTITUTION:When the level of an input signal VIFIN of an IF is lowered, a tuning meter driving voltage Vc is decreased and the gain of a 38kHz switching signal supply circuit 22 is reduced, then the stereo separation is lowered. The volage Vc is applied also to a cutoff frequency controlling circuit and the cutoff frequency is lowered by decreasing the 1st and 2nd variable impedances 61, 62. An output proportional to the amplitude of a high band noise signal is obtained by giving an FM detection signal to an HPF1 and a level detector 2. This output is in wired-AND connection to a tuning meter driving lines via an inverting circuit. Thus, when the high band noise signal is increased, the tuning meter driving voltage Vc is lowered with the control voltage inversely proportional to it and the stereo separation and cutoff frequency are lowered.
JP11350480A 1980-08-20 1980-08-20 Fm receiver Granted JPS5738033A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11350480A JPS5738033A (en) 1980-08-20 1980-08-20 Fm receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11350480A JPS5738033A (en) 1980-08-20 1980-08-20 Fm receiver

Publications (2)

Publication Number Publication Date
JPS5738033A true JPS5738033A (en) 1982-03-02
JPS6317257B2 JPS6317257B2 (en) 1988-04-13

Family

ID=14613992

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11350480A Granted JPS5738033A (en) 1980-08-20 1980-08-20 Fm receiver

Country Status (1)

Country Link
JP (1) JPS5738033A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58194546U (en) * 1982-06-22 1983-12-24 パイオニア株式会社 receiving device
US5455866A (en) * 1992-07-10 1995-10-03 Pioneer Electronic Corporation Adaptive separation control for stereophonic radio receiver
JP2008245183A (en) * 2007-03-29 2008-10-09 Clarion Co Ltd Receiver and receiving method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5291259A (en) * 1976-01-26 1977-08-01 Masakatsu Makino Twoothrow hook

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2440163A1 (en) * 1974-08-21 1976-03-11 Transform Verstaerkungsmasch PRESSING POWER GENERATORS FOR MACHINING MACHINES
JPS5349901A (en) * 1976-10-18 1978-05-06 Mitsubishi Electric Corp Fm receover
JPS5333502A (en) * 1977-09-19 1978-03-29 Torio Kk Device for automatically switching between stereo and monaural in fm receiver
JPS5528682A (en) * 1978-08-23 1980-02-29 Matsushita Electric Ind Co Ltd Fm stereo receiver

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5291259A (en) * 1976-01-26 1977-08-01 Masakatsu Makino Twoothrow hook

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58194546U (en) * 1982-06-22 1983-12-24 パイオニア株式会社 receiving device
JPS6314516Y2 (en) * 1982-06-22 1988-04-22
US5455866A (en) * 1992-07-10 1995-10-03 Pioneer Electronic Corporation Adaptive separation control for stereophonic radio receiver
JP2008245183A (en) * 2007-03-29 2008-10-09 Clarion Co Ltd Receiver and receiving method

Also Published As

Publication number Publication date
JPS6317257B2 (en) 1988-04-13

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