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JPS5750156A - Am detection system - Google Patents

Am detection system

Info

Publication number
JPS5750156A
JPS5750156A JP12451980A JP12451980A JPS5750156A JP S5750156 A JPS5750156 A JP S5750156A JP 12451980 A JP12451980 A JP 12451980A JP 12451980 A JP12451980 A JP 12451980A JP S5750156 A JPS5750156 A JP S5750156A
Authority
JP
Japan
Prior art keywords
circuit
signal
amplifier
differential amplifier
output
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
JP12451980A
Other languages
Japanese (ja)
Other versions
JPS6331132B2 (en
Inventor
Nagao Sasahara
Kazuo Saito
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 Denshi KK
Original Assignee
Hitachi Denshi KK
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 Denshi KK filed Critical Hitachi Denshi KK
Priority to JP12451980A priority Critical patent/JPS5750156A/en
Publication of JPS5750156A publication Critical patent/JPS5750156A/en
Publication of JPS6331132B2 publication Critical patent/JPS6331132B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/02—Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation
    • H04L27/06—Demodulator circuits; Receiver circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Dc Digital Transmission (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

PURPOSE:To obtain a normal detection output without phase distortion even with a level variance in an input signal, by applying a detection signal and a signal obtained through the differentiation of the said detection signal to a differential amplifier. CONSTITUTION:An AM demodulation wave is amplified at an amplifier 2 after band limit at a band filter 1, and applied to one input terminal of a differential amplifier 9 after being rectified at a rectifying circuit 3. The rectified output of the circuit 3 is picked up via a differentiation circuit 5, rectifying circuit 6, and OR circuit 8 and applied to another input terminal of the amplifier 9. A constant voltage is applied to another input of the OR circuit 8 from a fixed bias power supply 7, and a detection signal without effect of signal level variance of signal can be obtained from the output of the differential amplifier 9 by adjusting this fixed bias voltage.
JP12451980A 1980-09-10 1980-09-10 Am detection system Granted JPS5750156A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12451980A JPS5750156A (en) 1980-09-10 1980-09-10 Am detection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12451980A JPS5750156A (en) 1980-09-10 1980-09-10 Am detection system

Publications (2)

Publication Number Publication Date
JPS5750156A true JPS5750156A (en) 1982-03-24
JPS6331132B2 JPS6331132B2 (en) 1988-06-22

Family

ID=14887482

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12451980A Granted JPS5750156A (en) 1980-09-10 1980-09-10 Am detection system

Country Status (1)

Country Link
JP (1) JPS5750156A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01149646A (en) * 1987-12-07 1989-06-12 Nec Corp Wave detecting circuit with level fluctuation correcting function
JP2010283582A (en) * 2009-06-04 2010-12-16 Mitsubishi Electric Corp In-vehicle device remote control system and in-vehicle device remote control method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01149646A (en) * 1987-12-07 1989-06-12 Nec Corp Wave detecting circuit with level fluctuation correcting function
JP2010283582A (en) * 2009-06-04 2010-12-16 Mitsubishi Electric Corp In-vehicle device remote control system and in-vehicle device remote control method

Also Published As

Publication number Publication date
JPS6331132B2 (en) 1988-06-22

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