JPS6424614A - Differential amplifier circuit - Google Patents

Differential amplifier circuit

Info

Publication number
JPS6424614A
JPS6424614A JP18143187A JP18143187A JPS6424614A JP S6424614 A JPS6424614 A JP S6424614A JP 18143187 A JP18143187 A JP 18143187A JP 18143187 A JP18143187 A JP 18143187A JP S6424614 A JPS6424614 A JP S6424614A
Authority
JP
Japan
Prior art keywords
base
trs
capacitance
cascode connection
collector
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
JP18143187A
Other languages
Japanese (ja)
Inventor
Hidehiko Aoki
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
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 Toshiba Corp filed Critical Toshiba Corp
Priority to JP18143187A priority Critical patent/JPS6424614A/en
Publication of JPS6424614A publication Critical patent/JPS6424614A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/45—Differential amplifiers
    • H03F3/45071—Differential amplifiers with semiconductor devices only
    • H03F3/45076—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier
    • H03F3/4508—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier using bipolar transistors as the active amplifying circuit
    • H03F3/45085—Long tailed pairs
    • H03F3/45089—Non-folded cascode stages

Landscapes

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

Abstract

PURPOSE:To use the titled circuit at a high frequency band by providing a 3rd transistor(TR) in cascode connection to either 1st or 2nd TR and connecting the base to a node of a potential point having the same polarity as that of an input signal to the base of the 1st or 2nd TR of the side in cascode connection. CONSTITUTION:The bases of TRs Q19, Q20 having common base connection receives a constant voltage generated by diodes D13, D14 and a resistor R13 and they are in cascode connection. Then the base of a TR Q21 interposed and connected between TRs Q17, Q19 is connected to a potential point being of the same polarity as that of an input signal VIN to the base of the TR Q17, that is, to the collector of the TR Q18. That is, the input capacitance of either the TR Q17 or Q18 is cancelled by the TR Q21. As a result, the ground capacitance viewed from the input side due to the capacitance existing between the collector and base of the TRs is reduced sufficiently and the use at a high frequency band is attained.
JP18143187A 1987-07-21 1987-07-21 Differential amplifier circuit Pending JPS6424614A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18143187A JPS6424614A (en) 1987-07-21 1987-07-21 Differential amplifier circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18143187A JPS6424614A (en) 1987-07-21 1987-07-21 Differential amplifier circuit

Publications (1)

Publication Number Publication Date
JPS6424614A true JPS6424614A (en) 1989-01-26

Family

ID=16100656

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18143187A Pending JPS6424614A (en) 1987-07-21 1987-07-21 Differential amplifier circuit

Country Status (1)

Country Link
JP (1) JPS6424614A (en)

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