JPS5775050A - Am detecting circuit - Google Patents

Am detecting circuit

Info

Publication number
JPS5775050A
JPS5775050A JP15008780A JP15008780A JPS5775050A JP S5775050 A JPS5775050 A JP S5775050A JP 15008780 A JP15008780 A JP 15008780A JP 15008780 A JP15008780 A JP 15008780A JP S5775050 A JPS5775050 A JP S5775050A
Authority
JP
Japan
Prior art keywords
signal
output
circuit
adder
detecting circuit
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
JP15008780A
Other languages
Japanese (ja)
Inventor
Nagao Sasahara
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 JP15008780A priority Critical patent/JPS5775050A/en
Publication of JPS5775050A publication Critical patent/JPS5775050A/en
Pending 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

Abstract

PURPOSE:To suppress the distortion due to a hump to obtain a distortionless detection signal, by generating a voltage signal of a prescribed time width based on the rise part of the output of an AM detecting circuit and by slicing a signal obtained by adding this signal and the output of the detecting circuit. CONSTITUTION:The receiving wave which has the amplitude modulated by a square wave has the band limited by a filter 2 and is converted to DC by a rectifying circuit 4. The output of the rectifying circuit 4 is inputted to not only an adder 11 but also a variation detecting circuit 8, and the rise part and the fall part are taken out as a positive pulse and a negative pulse respectively. A rectifying circuit 9 takes out a negative pulse signal indicating the fall part and sends it to a timer circuit 10. The timer circuit 10 generates a negative voltage signal of a prescribed width and applied it to the adder 11. The signal from the adder 11 is applied to a comparator 5, and a signal where the hump generated by band limiting of the filter 2 is suppressed is obtained as the output.
JP15008780A 1980-10-28 1980-10-28 Am detecting circuit Pending JPS5775050A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15008780A JPS5775050A (en) 1980-10-28 1980-10-28 Am detecting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15008780A JPS5775050A (en) 1980-10-28 1980-10-28 Am detecting circuit

Publications (1)

Publication Number Publication Date
JPS5775050A true JPS5775050A (en) 1982-05-11

Family

ID=15489223

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15008780A Pending JPS5775050A (en) 1980-10-28 1980-10-28 Am detecting circuit

Country Status (1)

Country Link
JP (1) JPS5775050A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62160827A (en) * 1985-12-31 1987-07-16 インタ−ナショナル・ビジネス・マシ−ンズ・コ−ポレ−ション Method and apparatus for pulse signal processing
FR2756953A1 (en) * 1996-12-10 1998-06-12 Innovatron Ind Sa PORTABLE TELEALIMENTAL OBJECT FOR CONTACTLESS COMMUNICATION WITH A TERMINAL

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62160827A (en) * 1985-12-31 1987-07-16 インタ−ナショナル・ビジネス・マシ−ンズ・コ−ポレ−ション Method and apparatus for pulse signal processing
FR2756953A1 (en) * 1996-12-10 1998-06-12 Innovatron Ind Sa PORTABLE TELEALIMENTAL OBJECT FOR CONTACTLESS COMMUNICATION WITH A TERMINAL
WO1998026370A1 (en) * 1996-12-10 1998-06-18 Innovatron Industries, Societe Anonyme Data exchange system by contactless communication between a terminal and remote powered portable objects

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