JPS5763910A - Differential amplifying circuit - Google Patents

Differential amplifying circuit

Info

Publication number
JPS5763910A
JPS5763910A JP13865580A JP13865580A JPS5763910A JP S5763910 A JPS5763910 A JP S5763910A JP 13865580 A JP13865580 A JP 13865580A JP 13865580 A JP13865580 A JP 13865580A JP S5763910 A JPS5763910 A JP S5763910A
Authority
JP
Japan
Prior art keywords
amplifier
circuit
amplifying circuit
terminal
output
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.)
Granted
Application number
JP13865580A
Other languages
Japanese (ja)
Other versions
JPS6221446B2 (en
Inventor
Takafumi Nakajo
Toshitaka Tsuda
Tsutomu Kamoto
Yoichi Nagata
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
Nippon Telegraph and Telephone Corp
Original Assignee
Fujitsu Ltd
Nippon Telegraph and Telephone 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 Fujitsu Ltd, Nippon Telegraph and Telephone Corp filed Critical Fujitsu Ltd
Priority to JP13865580A priority Critical patent/JPS5763910A/en
Publication of JPS5763910A publication Critical patent/JPS5763910A/en
Publication of JPS6221446B2 publication Critical patent/JPS6221446B2/ja
Granted 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manipulation Of Pulses (AREA)
  • Amplifiers (AREA)

Abstract

PURPOSE:To decrease the number of repeating terminals for connections between an amplifying circuit and external elements, by using only one frequency selecting circuit. CONSTITUTION:A differential amplifier 21 amplifies the difference between an input signal supplied to a terminal 26 and a reference DC voltage applied to a terminal 27. The uninverted output of the amplifier 21 is amplified by the amplifier 30 of a frequency selecting circuit 22. The circuit 22 is provided with capacitors externally. An amplifier 23, on the other hand, is applied with the reference DC voltage from the terminal 27. The amplifier 23 has the same gain as the inphase gain of the amplifier 21 and its output is supplied to an amplifier 24. The amplifier 24 has the same DC input and output characteristics with the amplifier 30. Outputs of the amplifiers 30 and 24 are supplied to a differential amplifier 25, which amplifies the difference between those two inputs to send a pair of an inverted and an uninverted output. Consequently, one passive element part in a frequency selecting circuit is required to decrease the number of external elements, such as the capacitors, thereby decreasing the number of repeating terminals for connections between the amplifying circuit and the external elements.
JP13865580A 1980-10-06 1980-10-06 Differential amplifying circuit Granted JPS5763910A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13865580A JPS5763910A (en) 1980-10-06 1980-10-06 Differential amplifying circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13865580A JPS5763910A (en) 1980-10-06 1980-10-06 Differential amplifying circuit

Publications (2)

Publication Number Publication Date
JPS5763910A true JPS5763910A (en) 1982-04-17
JPS6221446B2 JPS6221446B2 (en) 1987-05-13

Family

ID=15227047

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13865580A Granted JPS5763910A (en) 1980-10-06 1980-10-06 Differential amplifying circuit

Country Status (1)

Country Link
JP (1) JPS5763910A (en)

Also Published As

Publication number Publication date
JPS6221446B2 (en) 1987-05-13

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