JPS5666909A - Predistorter - Google Patents

Predistorter

Info

Publication number
JPS5666909A
JPS5666909A JP14250179A JP14250179A JPS5666909A JP S5666909 A JPS5666909 A JP S5666909A JP 14250179 A JP14250179 A JP 14250179A JP 14250179 A JP14250179 A JP 14250179A JP S5666909 A JPS5666909 A JP S5666909A
Authority
JP
Japan
Prior art keywords
signal
amplifier
input
output
multiplier
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
JP14250179A
Other languages
Japanese (ja)
Inventor
Eiji Okamoto
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP14250179A priority Critical patent/JPS5666909A/en
Publication of JPS5666909A publication Critical patent/JPS5666909A/en
Pending 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 obtain the signal without distortion at the output of an amplifier, by inputting an input signal to the amplifier after distorting it with opposite characteristics as those of the amplifier. CONSTITUTION:The 1st function generator 202 in which the signal A(t) obtained from an input signal through envelope detection is input, produces a signal F[A(t)]. The 2nd function generator 204 to which A(t) is input, produces the signal g[A (t)]. F[A(t)] modulates the original input signal at a multiplier 205 and gives an effect to the amplitude characteristics. The g[A(t)] modulates the output signal of the multiplier 205 at a phase modulator 206 and gives the phase characteristics. The distortion included in the output signal of the amplifier can be avoided by adjusting the effect to the amplitude and phase characteristics so that the characteristics of the subsequent amplifiers can be compensated.
JP14250179A 1979-11-02 1979-11-02 Predistorter Pending JPS5666909A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14250179A JPS5666909A (en) 1979-11-02 1979-11-02 Predistorter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14250179A JPS5666909A (en) 1979-11-02 1979-11-02 Predistorter

Publications (1)

Publication Number Publication Date
JPS5666909A true JPS5666909A (en) 1981-06-05

Family

ID=15316800

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14250179A Pending JPS5666909A (en) 1979-11-02 1979-11-02 Predistorter

Country Status (1)

Country Link
JP (1) JPS5666909A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59219006A (en) * 1983-05-27 1984-12-10 Matsushita Electric Ind Co Ltd electronic circuit equipment
JPH03198512A (en) * 1989-12-27 1991-08-29 Mitsubishi Electric Corp High frequency amplifier
JPH0837427A (en) * 1994-07-25 1996-02-06 Nec Corp Nonlinear characteristic generating circuit
US5939920A (en) * 1996-03-08 1999-08-17 Fujitsu Limited Method and apparatus which adds distortion to a signal to compensate for distortion added at a later stage by a nonlinear element

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS505706U (en) * 1973-05-18 1975-01-21

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS505706U (en) * 1973-05-18 1975-01-21

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59219006A (en) * 1983-05-27 1984-12-10 Matsushita Electric Ind Co Ltd electronic circuit equipment
JPH03198512A (en) * 1989-12-27 1991-08-29 Mitsubishi Electric Corp High frequency amplifier
JPH0837427A (en) * 1994-07-25 1996-02-06 Nec Corp Nonlinear characteristic generating circuit
US5939920A (en) * 1996-03-08 1999-08-17 Fujitsu Limited Method and apparatus which adds distortion to a signal to compensate for distortion added at a later stage by a nonlinear element

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