JPS5574224A - Signal amplifying circuit - Google Patents

Signal amplifying circuit

Info

Publication number
JPS5574224A
JPS5574224A JP14760678A JP14760678A JPS5574224A JP S5574224 A JPS5574224 A JP S5574224A JP 14760678 A JP14760678 A JP 14760678A JP 14760678 A JP14760678 A JP 14760678A JP S5574224 A JPS5574224 A JP S5574224A
Authority
JP
Japan
Prior art keywords
frequency
emitter
capacitor
transistor
amplifying circuit
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
JP14760678A
Other languages
Japanese (ja)
Inventor
Eiichi Matsumura
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP14760678A priority Critical patent/JPS5574224A/en
Publication of JPS5574224A publication Critical patent/JPS5574224A/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
    • H03F3/04—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements with semiconductor devices only

Landscapes

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

Abstract

PURPOSE:To reduce the frequency dependancy of output, by connecting capacitor between the emitter and reference potential of the common emitter type amplifier. CONSTITUTION:To the emitter of transistor Q11 constituting the common emitter amplifier, the terminal j is provided and the capacitor C10 is connected. The voltage gain Av of transistor Q11 is given by Av RL/(ro+1/2pifC10) (where: ro is the emitter junction resistance of Q11). Taking RL as constant value, since the impedance of the capacitor is changed with frequency, the gain increases at higher frequency and decreases at lower frequency. Thus, the reception sensitivity difference can be reduced with the change in the frequency of input signal.
JP14760678A 1978-11-29 1978-11-29 Signal amplifying circuit Pending JPS5574224A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14760678A JPS5574224A (en) 1978-11-29 1978-11-29 Signal amplifying circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14760678A JPS5574224A (en) 1978-11-29 1978-11-29 Signal amplifying circuit

Publications (1)

Publication Number Publication Date
JPS5574224A true JPS5574224A (en) 1980-06-04

Family

ID=15434124

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14760678A Pending JPS5574224A (en) 1978-11-29 1978-11-29 Signal amplifying circuit

Country Status (1)

Country Link
JP (1) JPS5574224A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61210711A (en) * 1985-03-14 1986-09-18 Nec Corp Amplifier
JPS6211310A (en) * 1985-05-21 1987-01-20 エリクソン　ジーイー　モービル　コミュニケーションズ　インコーポレーテッド Integrated circuit rf amplifier module

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61210711A (en) * 1985-03-14 1986-09-18 Nec Corp Amplifier
JPH0466124B2 (en) * 1985-03-14 1992-10-22 Nippon Electric Co
JPS6211310A (en) * 1985-05-21 1987-01-20 エリクソン　ジーイー　モービル　コミュニケーションズ　インコーポレーテッド Integrated circuit rf amplifier module

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