JPS5510209A - Transistor amplifier circuit - Google Patents

Transistor amplifier circuit

Info

Publication number
JPS5510209A
JPS5510209A JP8190478A JP8190478A JPS5510209A JP S5510209 A JPS5510209 A JP S5510209A JP 8190478 A JP8190478 A JP 8190478A JP 8190478 A JP8190478 A JP 8190478A JP S5510209 A JPS5510209 A JP S5510209A
Authority
JP
Japan
Prior art keywords
resistance
prevented
transistor
output
amplifier
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
JP8190478A
Other languages
Japanese (ja)
Other versions
JPS6119130B2 (en
Inventor
Kunio Seki
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 JP8190478A priority Critical patent/JPS5510209A/en
Publication of JPS5510209A publication Critical patent/JPS5510209A/en
Publication of JPS6119130B2 publication Critical patent/JPS6119130B2/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
    • H03F3/34—DC amplifiers in which all stages are DC-coupled
    • H03F3/343—DC amplifiers in which all stages are DC-coupled with semiconductor devices only

Landscapes

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

Abstract

PURPOSE:To prevent malfunction at the time of an excessive input by extracting the output of a differential transistor amplifier from a current Miller circuit via a resistance. CONSTITUTION:Both PNP transistor Q1 and NPN transistor Q2, constituting the cascaded and modified differential transistor amplifier, are connected to Q3 and Q4 constituting the current Miller circuit via resistance R1. When input terminal IN is applied with a negative excessive input signal, resistance R1 limits an output current to the current Miller circuit, causing a voltage drop across resistance R1. The power voltage of the amplifier circuit can therefore be prevented from falling without lowering the emitter potentials of Q3 and Q4 and output transistor Q4 can also be prevented from being saturated; even at the time of an excessive input, the operations of driving transistors Q6 and Q7 can be held, so that malfunction can be prevented.
JP8190478A 1978-07-07 1978-07-07 Transistor amplifier circuit Granted JPS5510209A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8190478A JPS5510209A (en) 1978-07-07 1978-07-07 Transistor amplifier circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8190478A JPS5510209A (en) 1978-07-07 1978-07-07 Transistor amplifier circuit

Publications (2)

Publication Number Publication Date
JPS5510209A true JPS5510209A (en) 1980-01-24
JPS6119130B2 JPS6119130B2 (en) 1986-05-15

Family

ID=13759421

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8190478A Granted JPS5510209A (en) 1978-07-07 1978-07-07 Transistor amplifier circuit

Country Status (1)

Country Link
JP (1) JPS5510209A (en)

Also Published As

Publication number Publication date
JPS6119130B2 (en) 1986-05-15

Similar Documents

Publication Publication Date Title
GB1101875A (en) Amplifier
JPS5644208A (en) Amplifier
ES402652A1 (en) Amplifier circuit
GB1343329A (en) Amplifier using bipolar and field-effect transistors
GB764260A (en) Improvements in or relating to control of the amplification factor of a transistor
GB1083978A (en) Solid state modulator amplifier circuits
JPS5510209A (en) Transistor amplifier circuit
GB1388544A (en) Video output amplifier
GB1180611A (en) Improvements in or relating to Detector Circuits
JPS55143809A (en) Push-pull circuit
JPS5642409A (en) Output amplifying circuit
JPS56137717A (en) Current miller circuit
GB1372794A (en) Automatic gain control circuits
GB887933A (en) Improvements in or relating to electric logical circuits
GB1348397A (en) Balanced type amplifier circuit
JPS548951A (en) Differential amplifying circuit
GB860685A (en) Improvements in or relating to electronic switching devices
GB1307933A (en) Transistor amplifier unit
JPS5767305A (en) Limiter circuit
GB974105A (en) Improvements relating to transistor amplifier circuit arrangements
GB1021377A (en) Transistor buffer-stage
GB843366A (en) Improvements in and relating to transistor amplifiers
GB1536023A (en) Transistor amplifier circuits
JPS5432259A (en) Complementary pair circuit of transistor
JPS55115706A (en) Push pull amplifier