JPS55147813A - Bias circuit - Google Patents

Bias circuit

Info

Publication number
JPS55147813A
JPS55147813A JP5546479A JP5546479A JPS55147813A JP S55147813 A JPS55147813 A JP S55147813A JP 5546479 A JP5546479 A JP 5546479A JP 5546479 A JP5546479 A JP 5546479A JP S55147813 A JPS55147813 A JP S55147813A
Authority
JP
Japan
Prior art keywords
resistance
voltage
diode
transistor
emitter current
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
JP5546479A
Other languages
Japanese (ja)
Inventor
Yuji Noda
Toshiyuki Nishihara
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 JP5546479A priority Critical patent/JPS55147813A/en
Publication of JPS55147813A publication Critical patent/JPS55147813A/en
Pending 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
    • H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
    • H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
    • H03F1/0261—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers with control of the polarisation voltage or current, e.g. gliding Class A

Landscapes

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

Abstract

PURPOSE:To stabilize the operation of transistor and reduce the bias current, by providing a choke coil, which has one end connected to the base of the amplifying transistor, a power source terminal which transmits and receives the emitter current, and a resistance which is connected to the other end of the coil above and by cascading a diode and another resistance and by connecting these cascaded them in parallel to the resistance above. CONSTITUTION:Though the forward voltage at point 5 which is divided by bias resistances R1 and R2 is applied to the base of transistor (TR) through choke coil L, the magnitude of this voltage can be set to a magnitude just before conduction of TR. Next, when a high-frequency voltage is input from terminal 6 to increase the voltage, TR becomes conductive, and next, the forward voltage between both ends of resistance R1 is cancelled and reduced by the emitter current, and the potential at point 5 becomes a negative potential, and from this time, diode X starts to be conductive, and the emitter current is flowed to the circuit of resistance R1 and the series circuit of resistance R2 and diode X divisionally.
JP5546479A 1979-05-07 1979-05-07 Bias circuit Pending JPS55147813A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5546479A JPS55147813A (en) 1979-05-07 1979-05-07 Bias circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5546479A JPS55147813A (en) 1979-05-07 1979-05-07 Bias circuit

Publications (1)

Publication Number Publication Date
JPS55147813A true JPS55147813A (en) 1980-11-18

Family

ID=12999322

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5546479A Pending JPS55147813A (en) 1979-05-07 1979-05-07 Bias circuit

Country Status (1)

Country Link
JP (1) JPS55147813A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5268649A (en) * 1992-08-03 1993-12-07 Texas Instruments Incorporated Bias circuit for bipolar transistors

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5268649A (en) * 1992-08-03 1993-12-07 Texas Instruments Incorporated Bias circuit for bipolar transistors

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