JPS5683104A - Predistortion circuit - Google Patents

Predistortion circuit

Info

Publication number
JPS5683104A
JPS5683104A JP15989779A JP15989779A JPS5683104A JP S5683104 A JPS5683104 A JP S5683104A JP 15989779 A JP15989779 A JP 15989779A JP 15989779 A JP15989779 A JP 15989779A JP S5683104 A JPS5683104 A JP S5683104A
Authority
JP
Japan
Prior art keywords
circuit
signal
distortion
terminal
terminals
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
JP15989779A
Other languages
Japanese (ja)
Inventor
Shoji 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.)
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 JP15989779A priority Critical patent/JPS5683104A/en
Publication of JPS5683104A publication Critical patent/JPS5683104A/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 simplify the circuit constitution and to make small the size, while holding the characteristics of the predistortion circuit, by outputting a signal without distortion reflected via a resistance circuit and a signal with distortion signal component reflected via a nonlinear generation circuit after synthesis. CONSTITUTION:A signal input from the terminal A of a 90 deg. hybrid 101 reaches the terminals C, D, and the signal reflected at the terminals appears at the terminal B in-phase. Since the terminals C, D are connected with a signal branching circuit 102, nonlinear distortion generator 103, phase shift circuit 104 and resistance circuit 105, the signal without distortion reflected via the circuit 105 and the signal including distortion reflected via the nonlinear distortion generator 103 are synthesized and appear at the terminal B and are obtained from the terminal 2 as the output of the predistortion circuit after amplification 106. Thus, while keeping the characteristics of the predistortion circuit, the circuit constitution is simplified and the size can be made small.
JP15989779A 1979-12-10 1979-12-10 Predistortion circuit Pending JPS5683104A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15989779A JPS5683104A (en) 1979-12-10 1979-12-10 Predistortion circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15989779A JPS5683104A (en) 1979-12-10 1979-12-10 Predistortion circuit

Publications (1)

Publication Number Publication Date
JPS5683104A true JPS5683104A (en) 1981-07-07

Family

ID=15703557

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15989779A Pending JPS5683104A (en) 1979-12-10 1979-12-10 Predistortion circuit

Country Status (1)

Country Link
JP (1) JPS5683104A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5936406A (en) * 1982-08-23 1984-02-28 Nec Corp Distortion compensating circuit of predistortion system
US4588958A (en) * 1985-03-29 1986-05-13 Rca Corporation Adjustable reflective predistortion circuit
EP0277636A2 (en) * 1987-02-02 1988-08-10 Nec Corporation Nonlinear signal generating circuit and nonlinear compensating device using the same
US5015965A (en) * 1989-11-22 1991-05-14 General Electric Company Predistortion equalizer with resistive combiners and dividers
WO2001063753A1 (en) * 2000-02-25 2001-08-30 Telefonaktiebolaget Lm Ericsson (Publ) An analog reflective predistorter for power amplifiers

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5936406A (en) * 1982-08-23 1984-02-28 Nec Corp Distortion compensating circuit of predistortion system
US4588958A (en) * 1985-03-29 1986-05-13 Rca Corporation Adjustable reflective predistortion circuit
EP0277636A2 (en) * 1987-02-02 1988-08-10 Nec Corporation Nonlinear signal generating circuit and nonlinear compensating device using the same
US5015965A (en) * 1989-11-22 1991-05-14 General Electric Company Predistortion equalizer with resistive combiners and dividers
WO2001063753A1 (en) * 2000-02-25 2001-08-30 Telefonaktiebolaget Lm Ericsson (Publ) An analog reflective predistorter for power amplifiers

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