JPS5730405A - Semiconductor circuit - Google Patents

Semiconductor circuit

Info

Publication number
JPS5730405A
JPS5730405A JP10524380A JP10524380A JPS5730405A JP S5730405 A JPS5730405 A JP S5730405A JP 10524380 A JP10524380 A JP 10524380A JP 10524380 A JP10524380 A JP 10524380A JP S5730405 A JPS5730405 A JP S5730405A
Authority
JP
Japan
Prior art keywords
load
collector
norator
capacity
low noise
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
JP10524380A
Other languages
Japanese (ja)
Inventor
Satoshi Minojima
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP10524380A priority Critical patent/JPS5730405A/en
Publication of JPS5730405A publication Critical patent/JPS5730405A/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
    • H03F1/08—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements
    • H03F1/083—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements in transistor amplifiers
    • 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
    • H03F1/08—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements
    • H03F1/22—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements by use of cascode coupling, i.e. earthed cathode or emitter stage followed by earthed grid or base stage respectively

Landscapes

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

Abstract

PURPOSE:To avoid the effect of coolector capacity of a low noise transistor (TR), by connecting a norator having less collector capacitance between the collector and a load circuit of a low noise TR having greater collector capacitance. CONSTITUTION:A low noise TR11 is used as a differential amplifier, a TR16 of low collector capacity is connected as the norator to a load of the TR11, and a load 12 is connected as the norator load. Since the TR16 is connected to the load of the TR11 as the norator, even if the value of a collector capacity 13 of the TR11 is greater, as the decisive element of the cut-off frequency at an output OUT, the values of a capacity 17 of the TR16 and a load resistor 12 are related, allowing to provide a circuit having wide band.
JP10524380A 1980-07-31 1980-07-31 Semiconductor circuit Pending JPS5730405A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10524380A JPS5730405A (en) 1980-07-31 1980-07-31 Semiconductor circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10524380A JPS5730405A (en) 1980-07-31 1980-07-31 Semiconductor circuit

Publications (1)

Publication Number Publication Date
JPS5730405A true JPS5730405A (en) 1982-02-18

Family

ID=14402205

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10524380A Pending JPS5730405A (en) 1980-07-31 1980-07-31 Semiconductor circuit

Country Status (1)

Country Link
JP (1) JPS5730405A (en)

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