JPS5483742A - Electronic distortion compensating circuit - Google Patents

Electronic distortion compensating circuit

Info

Publication number
JPS5483742A
JPS5483742A JP15119577A JP15119577A JPS5483742A JP S5483742 A JPS5483742 A JP S5483742A JP 15119577 A JP15119577 A JP 15119577A JP 15119577 A JP15119577 A JP 15119577A JP S5483742 A JPS5483742 A JP S5483742A
Authority
JP
Japan
Prior art keywords
amplifier
cross
amp2
amp1
modulation distortion
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
JP15119577A
Other languages
Japanese (ja)
Other versions
JPS6043683B2 (en
Inventor
Tatsuo Watanabe
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 JP15119577A priority Critical patent/JPS6043683B2/en
Publication of JPS5483742A publication Critical patent/JPS5483742A/en
Publication of JPS6043683B2 publication Critical patent/JPS6043683B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/32—Modifications of amplifiers to reduce non-linear distortion
    • H03F1/3241—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)

Abstract

PURPOSE:To reduce greatly cross modulation distortion with simple constitution by making the cross mudulation distortion ratio of the 1st amplifier equal to a value obtained by substracting the doubled value of the gain of the 2nd amplifier from the cross modulation distortion ratio of the 2nd amplifier. CONSTITUTION:As for a pair of amplifiers AMP1 and AMP2 cascaded each other, a cross-modulated wave generated by amplifier AMP1 at the prior stage is 180 deg. out of phase with that generated by amplifier AMP2 at the post stage. Attenuator circuit ATT1 connected before amplifier AMP1 controls the input-output level of the whole circuit, and attenuator circuit ATT2 before amplifier AMP2 compensates a difference, between cross modulation distortion ratio IMD1 generated by amplifier AMP1 and the value obtained by subtracting the doubled value of the gain of amplifier AMP2 from cross mudulation distortion ratio IMD2 of amplifier AMP2, to zero. Consequently, the cross modulation distortion can be reduced greatly with simple constitution.
JP15119577A 1977-12-17 1977-12-17 Distortion compensation electronic circuit Expired JPS6043683B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15119577A JPS6043683B2 (en) 1977-12-17 1977-12-17 Distortion compensation electronic circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15119577A JPS6043683B2 (en) 1977-12-17 1977-12-17 Distortion compensation electronic circuit

Publications (2)

Publication Number Publication Date
JPS5483742A true JPS5483742A (en) 1979-07-04
JPS6043683B2 JPS6043683B2 (en) 1985-09-30

Family

ID=15513329

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15119577A Expired JPS6043683B2 (en) 1977-12-17 1977-12-17 Distortion compensation electronic circuit

Country Status (1)

Country Link
JP (1) JPS6043683B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6115406A (en) * 1984-06-28 1986-01-23 ジヨン、フル−ク、マニユフアクチユアリング、カンパニ−、インコ−ポレ−テツド Amplifying method and device
JPH02223207A (en) * 1988-11-10 1990-09-05 Hughes Aircraft Co Self-equalizing multistage radio frequency power amplifier

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6115406A (en) * 1984-06-28 1986-01-23 ジヨン、フル−ク、マニユフアクチユアリング、カンパニ−、インコ−ポレ−テツド Amplifying method and device
JPH02223207A (en) * 1988-11-10 1990-09-05 Hughes Aircraft Co Self-equalizing multistage radio frequency power amplifier

Also Published As

Publication number Publication date
JPS6043683B2 (en) 1985-09-30

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