JPS647706A - Fm detecting device - Google Patents

Fm detecting device

Info

Publication number
JPS647706A
JPS647706A JP16260687A JP16260687A JPS647706A JP S647706 A JPS647706 A JP S647706A JP 16260687 A JP16260687 A JP 16260687A JP 16260687 A JP16260687 A JP 16260687A JP S647706 A JPS647706 A JP S647706A
Authority
JP
Japan
Prior art keywords
signal
circuit
digital
constitution
detecting device
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
JP16260687A
Other languages
Japanese (ja)
Inventor
Kaoru Yamamoto
Shujiro Azuma
Jun Kanda
Hiroshi Sato
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.)
Pioneer Corp
Original Assignee
Pioneer Electronic 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 Pioneer Electronic Corp filed Critical Pioneer Electronic Corp
Priority to JP16260687A priority Critical patent/JPS647706A/en
Publication of JPS647706A publication Critical patent/JPS647706A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To simplify the constitution of a detecting device by processing a digital FM signal and a delaying FM signal, which are A/D-converted by one bit, with an exclusive OR circuit, a low frequency component detecting circuit, etc. CONSTITUTION:An analog FM signal is converted into the digital FM signal of one bit with an A/D converter 12. The signal and the 1/4 delayed digital FM signal of the period of a carrier frequency by a delaying circuit 13 are processed by an exclusive OR circuit 14, go to a signal in which a pulse width is constant, a pulse interval is changed in one direction corresponding to a modulating signal and sampled by a down-sampling circuit 16 through an inverter 5. The detecting output of the low frequency component is generated from the circuit 16. Thus, a Hilbert converting circuit to execute 90 deg. shifting of a carrier for a digital FM signal, an arc tangent arithmetic circuit, etc., become useless and the constitution of the FM detecting device can be simplified.
JP16260687A 1987-06-30 1987-06-30 Fm detecting device Pending JPS647706A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16260687A JPS647706A (en) 1987-06-30 1987-06-30 Fm detecting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16260687A JPS647706A (en) 1987-06-30 1987-06-30 Fm detecting device

Publications (1)

Publication Number Publication Date
JPS647706A true JPS647706A (en) 1989-01-11

Family

ID=15757790

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16260687A Pending JPS647706A (en) 1987-06-30 1987-06-30 Fm detecting device

Country Status (1)

Country Link
JP (1) JPS647706A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0470011A (en) * 1990-07-09 1992-03-05 Yasuto Takeuchi Fm demodulator
JP2014066717A (en) * 2009-05-22 2014-04-17 Seiko Epson Corp Frequency measuring device
JP2014077797A (en) * 2008-12-01 2014-05-01 Seiko Epson Corp Frequency measurement device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5666907A (en) * 1979-11-05 1981-06-05 Sony Corp Fm demodulator
JPS57188360A (en) * 1981-05-15 1982-11-19 Matsushita Electric Works Ltd Device for shaping decorative board
JPS614306A (en) * 1984-06-18 1986-01-10 Victor Co Of Japan Ltd Fm detecting circuit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5666907A (en) * 1979-11-05 1981-06-05 Sony Corp Fm demodulator
JPS57188360A (en) * 1981-05-15 1982-11-19 Matsushita Electric Works Ltd Device for shaping decorative board
JPS614306A (en) * 1984-06-18 1986-01-10 Victor Co Of Japan Ltd Fm detecting circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0470011A (en) * 1990-07-09 1992-03-05 Yasuto Takeuchi Fm demodulator
JP2014077797A (en) * 2008-12-01 2014-05-01 Seiko Epson Corp Frequency measurement device
JP2014066717A (en) * 2009-05-22 2014-04-17 Seiko Epson Corp Frequency measuring device

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