JPS57155840A - Distortion reducing circuit - Google Patents

Distortion reducing circuit

Info

Publication number
JPS57155840A
JPS57155840A JP4104981A JP4104981A JPS57155840A JP S57155840 A JPS57155840 A JP S57155840A JP 4104981 A JP4104981 A JP 4104981A JP 4104981 A JP4104981 A JP 4104981A JP S57155840 A JPS57155840 A JP S57155840A
Authority
JP
Japan
Prior art keywords
frequency
deltaf
signal
output
input signal
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.)
Granted
Application number
JP4104981A
Other languages
Japanese (ja)
Other versions
JPS6243612B2 (en
Inventor
Michinori Naito
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.)
TRIO KENWOOD CORP
Trio KK
Kenwood KK
Original Assignee
TRIO KENWOOD CORP
Trio KK
Kenwood KK
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 TRIO KENWOOD CORP, Trio KK, Kenwood KK filed Critical TRIO KENWOOD CORP
Priority to JP4104981A priority Critical patent/JPS57155840A/en
Publication of JPS57155840A publication Critical patent/JPS57155840A/en
Publication of JPS6243612B2 publication Critical patent/JPS6243612B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference

Abstract

PURPOSE:To reduce the distortion produced in a band pass filter, by passing an input signal through a band pass filter, after the frequency change in the input signal is decreased through the use of a heterodyne circuit. CONSTITUTION:An output of a voltage controlled oscillator VCO1 (frequency f2) and an input signal (frequency f1) applied to an input terminal IN are multiplied at a multiplier 2 to for a signal in frequency f3=f1-f2. When this signal passess through a band filter 4, it becomes a signal in frequency f4=f3'+f2, after it is multiplied with the output of the VCO1. On the other hand, when an output frequency f2 of the VCO1 is controlled so that it can be changed by a.DELTAf proportional to the change DELTAf in the input signal frequency, the f3 becomes as f3= (f1-f2)+(1-a)DELTAf, and the f3' and the f4 are as shown in EquationsIand II. When the a in Equation above is close to 1, an output reducing the harmonic distortion (DELTAf)<n> of the DELTAf can be obtained.
JP4104981A 1981-03-20 1981-03-20 Distortion reducing circuit Granted JPS57155840A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4104981A JPS57155840A (en) 1981-03-20 1981-03-20 Distortion reducing circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4104981A JPS57155840A (en) 1981-03-20 1981-03-20 Distortion reducing circuit

Publications (2)

Publication Number Publication Date
JPS57155840A true JPS57155840A (en) 1982-09-27
JPS6243612B2 JPS6243612B2 (en) 1987-09-16

Family

ID=12597542

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4104981A Granted JPS57155840A (en) 1981-03-20 1981-03-20 Distortion reducing circuit

Country Status (1)

Country Link
JP (1) JPS57155840A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63140742U (en) * 1987-03-06 1988-09-16

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01224021A (en) * 1988-03-02 1989-09-07 Toray Ind Inc Filter element

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS528072A (en) * 1975-07-09 1977-01-21 Imai Jitsugiyou Kk Method of producing stereoscopic pattern piece formed by blow molding
JPS52144258A (en) * 1976-05-27 1977-12-01 Fujitsu Ltd Fm signal demodulation circuit
JPS52149468A (en) * 1976-06-07 1977-12-12 Fujitsu Ltd Fm demodulating circuit
JPS5333384A (en) * 1976-09-07 1978-03-29 Amp Inc Electric connector for flat electric cable

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS528072A (en) * 1975-07-09 1977-01-21 Imai Jitsugiyou Kk Method of producing stereoscopic pattern piece formed by blow molding
JPS52144258A (en) * 1976-05-27 1977-12-01 Fujitsu Ltd Fm signal demodulation circuit
JPS52149468A (en) * 1976-06-07 1977-12-12 Fujitsu Ltd Fm demodulating circuit
JPS5333384A (en) * 1976-09-07 1978-03-29 Amp Inc Electric connector for flat electric cable

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63140742U (en) * 1987-03-06 1988-09-16
JPH0546360Y2 (en) * 1987-03-06 1993-12-03

Also Published As

Publication number Publication date
JPS6243612B2 (en) 1987-09-16

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