JPS5482149A - Microwave amplifier - Google Patents

Microwave amplifier

Info

Publication number
JPS5482149A
JPS5482149A JP14939877A JP14939877A JPS5482149A JP S5482149 A JPS5482149 A JP S5482149A JP 14939877 A JP14939877 A JP 14939877A JP 14939877 A JP14939877 A JP 14939877A JP S5482149 A JPS5482149 A JP S5482149A
Authority
JP
Japan
Prior art keywords
fet element
coupler
linearity
feed forward
microwave band
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
JP14939877A
Other languages
Japanese (ja)
Inventor
Takeshi Takano
Yasuyuki Tokumitsu
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 JP14939877A priority Critical patent/JPS5482149A/en
Publication of JPS5482149A publication Critical patent/JPS5482149A/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
    • H03F1/3205—Modifications of amplifiers to reduce non-linear distortion in field-effect transistor amplifiers

Landscapes

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

Abstract

PURPOSE:To secure the betterment of the linearity with a simple constitution by performing the feed forward control with skilful use of the charactristics of the FET element featuring the dual gate structure. CONSTITUTION:Coupler 4 is attached to amplifying step 1 via the microwave band FET element connected to the circuit at the front step as well as between amplifying step 2 and 3 using the microwave band FET element featuring the dual gate structure. The signals detected by coupler 4 are then detected (5) and eliminated for their distortions via LPF6. The output is applied to expansion circuit 8 which delivers the expansion effect via DC amplifier 7, and then the output voltage is biased negatively to be applied to the 2nd gate of the FET elements at step 2 and 3. Owing to application of such feed forward structure, high-linearity output signal d(d': conventional signal) with reduced distortion. At the same time, the 3rd and 5th mutual modulation product characteristics e and f are improved more than conventional e' and f'.
JP14939877A 1977-12-14 1977-12-14 Microwave amplifier Pending JPS5482149A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14939877A JPS5482149A (en) 1977-12-14 1977-12-14 Microwave amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14939877A JPS5482149A (en) 1977-12-14 1977-12-14 Microwave amplifier

Publications (1)

Publication Number Publication Date
JPS5482149A true JPS5482149A (en) 1979-06-30

Family

ID=15474251

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14939877A Pending JPS5482149A (en) 1977-12-14 1977-12-14 Microwave amplifier

Country Status (1)

Country Link
JP (1) JPS5482149A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS643208U (en) * 1987-06-19 1989-01-10
JPH0267526A (en) * 1988-07-20 1990-03-07 American Teleph & Telegr Co <Att> Light amplifier
JP2007215248A (en) * 2007-05-30 2007-08-23 Sony Corp Power amplifier and radio communication apparatus using the same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS643208U (en) * 1987-06-19 1989-01-10
JPH0267526A (en) * 1988-07-20 1990-03-07 American Teleph & Telegr Co <Att> Light amplifier
JP2007215248A (en) * 2007-05-30 2007-08-23 Sony Corp Power amplifier and radio communication apparatus using the same

Similar Documents

Publication Publication Date Title
ES8609857A1 (en) Television transmitter.
JPS5482149A (en) Microwave amplifier
EP0052415A3 (en) Frequency characteristic adjusting apparatus
JPS53108736A (en) Amplifier circuit
ES376856A1 (en) Television integrated i.f. amplifier circuits
GB1266005A (en)
JPS5360546A (en) Amplifier
JPS5317249A (en) Gain variable amplifier
JPS5345155A (en) Push-pull amplifier
JPS5437664A (en) Automatic gain adjusting circuit
ES335738A1 (en) Improvements in the construction of broadcast broadcast amplifiers of variable gain. (Machine-translation by Google Translate, not legally binding)
TH4403EX (en) A circuit arrangement for suppressing interference in the transmission of numerical remote control signals.
ES272140A1 (en) An energy amplifier device for side band signals (Machine-translation by Google Translate, not legally binding)
GB1420936A (en) Gain control arrangements
JPS5769911A (en) Amplifier
JPS5665514A (en) Control circuit of voltage feedback type
JPS54150056A (en) Amplifying device
JPS57208709A (en) Field effect transistor amplifier with low noise broad wide band
JPS5422811A (en) Amplifier
JPS535553A (en) Amplifier
JPS5394854A (en) Microwave amplifier
GB1013282A (en) Variable gain transistor amplifier
JPS56116309A (en) Field effect transistor amplifier
JPS5437665A (en) Automatic fain adjusting circuit
JPS568970A (en) Television signal receiver