JPS57135506A - Slope detection system - Google Patents

Slope detection system

Info

Publication number
JPS57135506A
JPS57135506A JP2205081A JP2205081A JPS57135506A JP S57135506 A JPS57135506 A JP S57135506A JP 2205081 A JP2205081 A JP 2205081A JP 2205081 A JP2205081 A JP 2205081A JP S57135506 A JPS57135506 A JP S57135506A
Authority
JP
Japan
Prior art keywords
noise
deltaomega
domega
detection
current
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
JP2205081A
Other languages
Japanese (ja)
Inventor
Isamu Tsuda
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 JP2205081A priority Critical patent/JPS57135506A/en
Publication of JPS57135506A publication Critical patent/JPS57135506A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D1/00—Demodulation of amplitude-modulated oscillations

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Circuits Of Receivers In General (AREA)
  • Noise Elimination (AREA)

Abstract

PURPOSE:To easily obtain detection characteristics equal to that of a circuit which has turning characteristics with a high Q value, by decreasing the ratio of An FM and an AM noise having a certain relation below a specific value. CONSTITUTION:The frequency shift DELTAomega of an FM noise contained in a received signal and the amplitude of an AM noise have a relation DELTAi=F(DELTAomega). When slope detection characteristics are expressed by f(i,omega), the gradient of slope characteristics is df/domega and the detected noise current of the FM noise is (df/domega)DELTAomega. Therefore, a noise detection current is the sum df/di.F(DELTAomega)+df/domega.DELTAomega of both noise detection currents. For this purpose, the df/domega and df/di are so set that the current value is a half as great as or less than the half of the amplitude of the AM noise detection current. Consequently, an expression holds. Thus, detection characteristics equal to that of a circuit having tuning characteristics with an extremely high Q value are obtained easily and the FM noise and AM noise having a constant relation mutually cancel.
JP2205081A 1981-02-16 1981-02-16 Slope detection system Pending JPS57135506A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2205081A JPS57135506A (en) 1981-02-16 1981-02-16 Slope detection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2205081A JPS57135506A (en) 1981-02-16 1981-02-16 Slope detection system

Publications (1)

Publication Number Publication Date
JPS57135506A true JPS57135506A (en) 1982-08-21

Family

ID=12072088

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2205081A Pending JPS57135506A (en) 1981-02-16 1981-02-16 Slope detection system

Country Status (1)

Country Link
JP (1) JPS57135506A (en)

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