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JPS5739605A - Preamplifier - Google Patents

Preamplifier

Info

Publication number
JPS5739605A
JPS5739605A JP11506480A JP11506480A JPS5739605A JP S5739605 A JPS5739605 A JP S5739605A JP 11506480 A JP11506480 A JP 11506480A JP 11506480 A JP11506480 A JP 11506480A JP S5739605 A JPS5739605 A JP S5739605A
Authority
JP
Japan
Prior art keywords
signal
preamplifier
ground
terminal
trq21
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
JP11506480A
Other languages
Japanese (ja)
Other versions
JPS622721B2 (en
Inventor
Shigeru Tomita
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
Tokyo Shibaura Electric Co 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP11506480A priority Critical patent/JPS5739605A/en
Publication of JPS5739605A publication Critical patent/JPS5739605A/en
Publication of JPS622721B2 publication Critical patent/JPS622721B2/ja
Granted 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

Landscapes

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

Abstract

PURPOSE:To prevent the deterioration of frequency characteristics of a preamplifier and oscillation and to achieve the preamplifier suitable for circuit integration, by incorporating a ground line of the preamplifier and that of a signal processing circuit provided at the post stage of it, so that the reproduced signal such as a magnetic recorder/reproducer and the like can not flow to a ground terminal. CONSTITUTION:A preamplifier 21 consists of a transistor TRQ21, the base of which is connected to one terminal of a transformer T21 induced with an input (reproduced) signal Vi and the emitter of which is connected to another terminal of the transformer T21 via a capacitor C21, and a resistor R22 inserted between the emitter of the TRQ21 and ground, and a base bias circuit consisting of a base bias power supply E21 and resistor R23 is provided between the transformer T21 and ground. The signal Vi is picked up from the collector of the TRQ21 and an output VO is taken via TRs Q22, Q23 and it is applied to a signal processing circuit provided at the post stage. Thus, the signal Vi does not pass through a ground terminal 3, the signal Vi is not affected even if the operating current of the signal processing circuit flows to the terminal 3.
JP11506480A 1980-08-21 1980-08-21 Preamplifier Granted JPS5739605A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11506480A JPS5739605A (en) 1980-08-21 1980-08-21 Preamplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11506480A JPS5739605A (en) 1980-08-21 1980-08-21 Preamplifier

Publications (2)

Publication Number Publication Date
JPS5739605A true JPS5739605A (en) 1982-03-04
JPS622721B2 JPS622721B2 (en) 1987-01-21

Family

ID=14653275

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11506480A Granted JPS5739605A (en) 1980-08-21 1980-08-21 Preamplifier

Country Status (1)

Country Link
JP (1) JPS5739605A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009111933A (en) * 2007-10-31 2009-05-21 Icom Inc Low-noise amplifier, and differential amplifier
JP2013191910A (en) * 2012-03-12 2013-09-26 Fujitsu Ltd Amplifier and amplification method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009111933A (en) * 2007-10-31 2009-05-21 Icom Inc Low-noise amplifier, and differential amplifier
JP2013191910A (en) * 2012-03-12 2013-09-26 Fujitsu Ltd Amplifier and amplification method

Also Published As

Publication number Publication date
JPS622721B2 (en) 1987-01-21

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