JPS5443663A - Wide band negative feedback amplifier - Google Patents

Wide band negative feedback amplifier

Info

Publication number
JPS5443663A
JPS5443663A JP11029877A JP11029877A JPS5443663A JP S5443663 A JPS5443663 A JP S5443663A JP 11029877 A JP11029877 A JP 11029877A JP 11029877 A JP11029877 A JP 11029877A JP S5443663 A JPS5443663 A JP S5443663A
Authority
JP
Japan
Prior art keywords
circuit
amplifier
feedback
wide band
feedback system
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
JP11029877A
Other languages
Japanese (ja)
Inventor
Takao Nakano
Isao Nakazawa
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 JP11029877A priority Critical patent/JPS5443663A/en
Publication of JPS5443663A publication Critical patent/JPS5443663A/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
    • H03F1/42—Modifications of amplifiers to extend the bandwidth
    • H03F1/48—Modifications of amplifiers to extend the bandwidth of aperiodic amplifiers
    • H03F1/486—Modifications of amplifiers to extend the bandwidth of aperiodic amplifiers with IC amplifier blocks

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)

Abstract

PURPOSE:To improve the frequency characteristic in a low band by separating the feedback system into a feedback system for signals and a feedback system for DC bias and including a by-pass capacitor, which constitutes and amplifier, in the feedback system for signals. CONSTITUTION:A wide band amplifier dependent upon one power supply is constituted by I/O impedance matching resistances 1 and 1', DC cutting bypass capacitors 2 and 2', amplifier circuit 3 and feedback circuit 4. Besides this constitution, DC bias feedback circuit 5 is provided in parallel to amplifier circuit 3 and is in the state apart from the sngle system. Meanwhile, low-impedance power supply input circuit 6 is connected to amplifier circuit 3. In this manner, capacitors 2 and 2' are included in feedback system 4, and circuit 5 is newly provided and separated from the signal system, and low-impedance circuit 6 which can be ignored as a feedback loop is provided, thereby constituting an amplifier. Therefore, frequency characteristic extends to an ultra-low band and becomes a wide band characteristic.
JP11029877A 1977-09-13 1977-09-13 Wide band negative feedback amplifier Pending JPS5443663A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11029877A JPS5443663A (en) 1977-09-13 1977-09-13 Wide band negative feedback amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11029877A JPS5443663A (en) 1977-09-13 1977-09-13 Wide band negative feedback amplifier

Publications (1)

Publication Number Publication Date
JPS5443663A true JPS5443663A (en) 1979-04-06

Family

ID=14532141

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11029877A Pending JPS5443663A (en) 1977-09-13 1977-09-13 Wide band negative feedback amplifier

Country Status (1)

Country Link
JP (1) JPS5443663A (en)

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