JPS5730404A - Compensating circuit for cross modulation - Google Patents

Compensating circuit for cross modulation

Info

Publication number
JPS5730404A
JPS5730404A JP10363280A JP10363280A JPS5730404A JP S5730404 A JPS5730404 A JP S5730404A JP 10363280 A JP10363280 A JP 10363280A JP 10363280 A JP10363280 A JP 10363280A JP S5730404 A JPS5730404 A JP S5730404A
Authority
JP
Japan
Prior art keywords
output
subamplifier
main amplifier
cross modulation
phase
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
JP10363280A
Other languages
Japanese (ja)
Inventor
Masafumi Tanaka
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.)
Kokusai Denki Electric Inc
Original Assignee
Hitachi Denshi 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 Hitachi Denshi KK filed Critical Hitachi Denshi KK
Priority to JP10363280A priority Critical patent/JPS5730404A/en
Publication of JPS5730404A publication Critical patent/JPS5730404A/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
    • H03F1/3223—Modifications of amplifiers to reduce non-linear distortion using feed-forward

Landscapes

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

Abstract

PURPOSE:To improve the cross modulation, by branching a part of an input signal of a main amplifier, applying it to a subamplifier with greater nonlinear distortion, and after delaying the phase by 180 deg., adjusting the level of the output and synthesizing it with the output of the main amplifier. CONSTITUTION:An input signal from a signal input terminal is applied to a main amlifier 3, a part of it is picked up at a directional coupler 2 and applied to a subamplifier 4. In the subamplifier 4, the saturated output is smaller than that of the main amplifier 3 and the gain is almost the same, so that the absolute level of the cross modulation component can be greater. The output of the subamplifier 4 is matched to a suitable level by a variable attenuator 5 and the phase is delayed by 180 deg. by a variable phase shifter 6, it is applied to a directional coupler 2' and synthesized with the output of the main amplifier 3.
JP10363280A 1980-07-30 1980-07-30 Compensating circuit for cross modulation Pending JPS5730404A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10363280A JPS5730404A (en) 1980-07-30 1980-07-30 Compensating circuit for cross modulation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10363280A JPS5730404A (en) 1980-07-30 1980-07-30 Compensating circuit for cross modulation

Publications (1)

Publication Number Publication Date
JPS5730404A true JPS5730404A (en) 1982-02-18

Family

ID=14359139

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10363280A Pending JPS5730404A (en) 1980-07-30 1980-07-30 Compensating circuit for cross modulation

Country Status (1)

Country Link
JP (1) JPS5730404A (en)

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