JPS5470714A - Fm receiver - Google Patents

Fm receiver

Info

Publication number
JPS5470714A
JPS5470714A JP13747077A JP13747077A JPS5470714A JP S5470714 A JPS5470714 A JP S5470714A JP 13747077 A JP13747077 A JP 13747077A JP 13747077 A JP13747077 A JP 13747077A JP S5470714 A JPS5470714 A JP S5470714A
Authority
JP
Japan
Prior art keywords
circuit
emphasis
transistor
turned
field region
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
JP13747077A
Other languages
Japanese (ja)
Inventor
Kazuo Murayama
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.)
Sony Corp
Original Assignee
Sony 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 Sony Corp filed Critical Sony Corp
Priority to JP13747077A priority Critical patent/JPS5470714A/en
Publication of JPS5470714A publication Critical patent/JPS5470714A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G5/00—Tone control or bandwidth control in amplifiers
    • H03G5/16—Automatic control
    • H03G5/18—Automatic control in untuned amplifiers

Landscapes

  • Noise Elimination (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

PURPOSE:To decrease the noise component at the weak field region and to increase the articulation by increasing the de-emphasis constant in accordance with reduction of the detection level of the received wave. CONSTITUTION:At the reception time at the weak field region, the detection voltage of peak detection circuit 18 is lowered. And transistor 15 is turned off, and the collector features a high potential with transistor 13 and 14 turned on. Then the one end of capacitor 11 and 12 of de-emphasis adjusting circuit 6 is earthed to actuate circuit 6. Accordingly, the high band is attenuated according to the de-emphasis constant of circuit 6 for the aural signal of the output of detector circuit 4, and then the aural signal is supplied to the stereo demodulation part via capacitor 8.
JP13747077A 1977-11-16 1977-11-16 Fm receiver Pending JPS5470714A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13747077A JPS5470714A (en) 1977-11-16 1977-11-16 Fm receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13747077A JPS5470714A (en) 1977-11-16 1977-11-16 Fm receiver

Publications (1)

Publication Number Publication Date
JPS5470714A true JPS5470714A (en) 1979-06-06

Family

ID=15199348

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13747077A Pending JPS5470714A (en) 1977-11-16 1977-11-16 Fm receiver

Country Status (1)

Country Link
JP (1) JPS5470714A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0221729A (en) * 1988-07-11 1990-01-24 Fujitsu Ten Ltd Receiver

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0221729A (en) * 1988-07-11 1990-01-24 Fujitsu Ten Ltd Receiver

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