JPS57107616A - Fm detector - Google Patents

Fm detector

Info

Publication number
JPS57107616A
JPS57107616A JP18470280A JP18470280A JPS57107616A JP S57107616 A JPS57107616 A JP S57107616A JP 18470280 A JP18470280 A JP 18470280A JP 18470280 A JP18470280 A JP 18470280A JP S57107616 A JPS57107616 A JP S57107616A
Authority
JP
Japan
Prior art keywords
inductance
resonance circuit
capacitor
detector
circuit consisting
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
JP18470280A
Other languages
Japanese (ja)
Inventor
Shiyouji Tawa
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP18470280A priority Critical patent/JPS57107616A/en
Publication of JPS57107616A publication Critical patent/JPS57107616A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
    • H03D3/26—Demodulation of angle-, frequency- or phase- modulated oscillations by means of sloping amplitude/frequency characteristic of tuned or reactive circuit

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Processing Of Color Television Signals (AREA)

Abstract

PURPOSE:To compensate a delay characteristic of an FM detector, by adding a parallel resonance circuit consisting of an inductance and a capacitor between the base and the ground of a transistor (TR) of the prestage of the FM detector. CONSTITUTION:An FM signal inputted from an input terminal 1 is inputted to the base of a TR7, outputted from the emitter, resonated at the 1st series resonance circuit consisting of an inductance L1 and a capacitor C1 and the 2nd series resonance circuit consisting of an inductance L2 and the capacitor C1, the output voltage is rectified at diodeds 17, 18, respectively and a demodulation signal is obtained. A parallel resonance circuit consisting of an inductance L3 and a capacitor C3 is added between the base of the TR7 and ground, the resonance frequency of the parallel resonance circuit is located at the middle of the resonance frequencies of the 1st and 2nd series resonance circuits, and the phase of the FM detector is adjusted by adjusting the inductance L3.
JP18470280A 1980-12-25 1980-12-25 Fm detector Pending JPS57107616A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18470280A JPS57107616A (en) 1980-12-25 1980-12-25 Fm detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18470280A JPS57107616A (en) 1980-12-25 1980-12-25 Fm detector

Publications (1)

Publication Number Publication Date
JPS57107616A true JPS57107616A (en) 1982-07-05

Family

ID=16157874

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18470280A Pending JPS57107616A (en) 1980-12-25 1980-12-25 Fm detector

Country Status (1)

Country Link
JP (1) JPS57107616A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01206707A (en) * 1988-02-12 1989-08-18 Maspro Denkoh Corp Frequency discriminator
JPH01212905A (en) * 1988-02-19 1989-08-25 Maspro Denkoh Corp Frequency discriminator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01206707A (en) * 1988-02-12 1989-08-18 Maspro Denkoh Corp Frequency discriminator
JPH01212905A (en) * 1988-02-19 1989-08-25 Maspro Denkoh Corp Frequency discriminator

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