JPS5539423A - Double tuned frequency discrimination circuit - Google Patents

Double tuned frequency discrimination circuit

Info

Publication number
JPS5539423A
JPS5539423A JP11231178A JP11231178A JPS5539423A JP S5539423 A JPS5539423 A JP S5539423A JP 11231178 A JP11231178 A JP 11231178A JP 11231178 A JP11231178 A JP 11231178A JP S5539423 A JPS5539423 A JP S5539423A
Authority
JP
Japan
Prior art keywords
circuit
pass filter
output
supplied
input
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
JP11231178A
Other languages
Japanese (ja)
Inventor
Meiki Yahata
Shunsuke Yoda
Tadamichi Kawasaki
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP11231178A priority Critical patent/JPS5539423A/en
Publication of JPS5539423A publication Critical patent/JPS5539423A/en
Pending legal-status Critical Current

Links

Landscapes

  • Circuits Of Receivers In General (AREA)

Abstract

PURPOSE: To obtain the good detection characteristics with a simple circuit constitution by securing a time-division-type operation for two band pass filters of the same characteristics or one band pass filter and giving the frequency conversion to the input of one side.
CONSTITUTION: The input signal the amplitude modulation component of which is eliminated through the limiter is supplied to multiplier circuit 9 to which the output of sine wave generation circuit 8 is supplied as well as to scaler 7. The output of scaler 7 is supplied to one input of subtractor circuit 13 via band pass filter 10a, absolute value circuit 11a and low pass filter 12a each. Circuit 9 performs the multiplication between the input signal and the output (local oscillation signal) of circuit 8. And this multiplication result is supplied to the other input of circuit 13 via band pass filter 10b, absolute value circuit 11b and low pass filter 12b each. The output of circuit 13 functions as the FM detection output, and the above mentioned two filters feature the same characteristics.
COPYRIGHT: (C)1980,JPO&Japio
JP11231178A 1978-09-14 1978-09-14 Double tuned frequency discrimination circuit Pending JPS5539423A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11231178A JPS5539423A (en) 1978-09-14 1978-09-14 Double tuned frequency discrimination circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11231178A JPS5539423A (en) 1978-09-14 1978-09-14 Double tuned frequency discrimination circuit

Publications (1)

Publication Number Publication Date
JPS5539423A true JPS5539423A (en) 1980-03-19

Family

ID=14583493

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11231178A Pending JPS5539423A (en) 1978-09-14 1978-09-14 Double tuned frequency discrimination circuit

Country Status (1)

Country Link
JP (1) JPS5539423A (en)

Similar Documents

Publication Publication Date Title
KR920001870A (en) Electronic receiver for receiving modulated carrier signals
JPS54100617A (en) Mixer circuit
JPS5539423A (en) Double tuned frequency discrimination circuit
JPS5513512A (en) Frequency converter
JPS5634203A (en) Fm demodulator
JPS5571329A (en) Fm demodulator
JPS5539424A (en) Double tuned frequency discrimination circuit
JPS5361A (en) Fm modulation circuit
JPS5693490A (en) Sound intermediate frequency signal detecting circuit
SU465716A1 (en) Electrical signal delay device
JPS5531360A (en) Demodulator circuit
JPS5689157A (en) Modulating circuit
JPS57143906A (en) Fm demodulator for composite modulation system
SU693542A1 (en) Frequency-modulated signal demodulator with frequency feedback
SU614548A1 (en) Frequency-modulated signal demodulator
SU1187281A1 (en) Communication system
JPS5735402A (en) Frequency discriminating device
JPS5782213A (en) Demodulating system for fm video signal
JPS57154924A (en) Ideal filter
JPS5635559A (en) Phase modulating device
JPS5789311A (en) Fm signal demodulating system
JPS57186808A (en) Phase detecting circuit
JPS5634202A (en) Fm demodulating circuit
JPS55134586A (en) Sound multiplex program discriminator
JPS6484948A (en) Demodulation system for frequency modulation signal