JPS55143804A - Pulse count type frequency discriminator - Google Patents

Pulse count type frequency discriminator

Info

Publication number
JPS55143804A
JPS55143804A JP5128779A JP5128779A JPS55143804A JP S55143804 A JPS55143804 A JP S55143804A JP 5128779 A JP5128779 A JP 5128779A JP 5128779 A JP5128779 A JP 5128779A JP S55143804 A JPS55143804 A JP S55143804A
Authority
JP
Japan
Prior art keywords
circuit
characteristic
discriminator
selecting
resonating
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
JP5128779A
Other languages
Japanese (ja)
Inventor
Yoshio Nomachi
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP5128779A priority Critical patent/JPS55143804A/en
Publication of JPS55143804A publication Critical patent/JPS55143804A/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

Abstract

PURPOSE:To make it possible to use a discriminator for a wide-band FM carrier wave, by inserting a negative feedback circuit, which consists of a resonating circuit having a resonance frequency different from a resonating circuit for amplitude modulation, to a selecting circuit having the resonating circuit for amplitude modulation above to reduce the gain of the selecting circuit. CONSTITUTION:If resonance frequency f01 of negative feedback circuit 9 in selecting circuit 2 is made different from resonance frequency f02 of resonating circuit 4 and Q of them are set to approximately equal values, the impedance becomes larger according as the characteristic approaches frequency f01, and the series feedback quantity is increased to reduce the gain of circuit 2. Meanwhile, the impedance becomes larger according as the characteristic of circuit 4 approaches frequency f02, and the gain is increased. Since the characteristic of circuit 2 is a characteristic obtained by synthesizing both characteristics above, linearity of the inclination part is improved and the discriminator can be adapted to a wide band simply by selecting frequencies f01 and f02 properly. Consequently, the discriminator which can be used for the wide-band FM carrier wave can be obtained with a simple constitution.
JP5128779A 1979-04-24 1979-04-24 Pulse count type frequency discriminator Pending JPS55143804A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5128779A JPS55143804A (en) 1979-04-24 1979-04-24 Pulse count type frequency discriminator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5128779A JPS55143804A (en) 1979-04-24 1979-04-24 Pulse count type frequency discriminator

Publications (1)

Publication Number Publication Date
JPS55143804A true JPS55143804A (en) 1980-11-10

Family

ID=12882708

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5128779A Pending JPS55143804A (en) 1979-04-24 1979-04-24 Pulse count type frequency discriminator

Country Status (1)

Country Link
JP (1) JPS55143804A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007044481A (en) * 2005-07-15 2007-02-22 Srj Corp Method for collecting/transporting medical capsule and endoscope device used for the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007044481A (en) * 2005-07-15 2007-02-22 Srj Corp Method for collecting/transporting medical capsule and endoscope device used for the same

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