JPS64806A - Power amplifier circuit device - Google Patents

Power amplifier circuit device

Info

Publication number
JPS64806A
JPS64806A JP62155798A JP15579887A JPS64806A JP S64806 A JPS64806 A JP S64806A JP 62155798 A JP62155798 A JP 62155798A JP 15579887 A JP15579887 A JP 15579887A JP S64806 A JPS64806 A JP S64806A
Authority
JP
Japan
Prior art keywords
data
voltage
power amplifier
outputs
converter
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
JP62155798A
Other languages
Japanese (ja)
Other versions
JPH01806A (en
Inventor
Kinya Amano
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.)
Furuno Electric Co Ltd
Original Assignee
Furuno 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 Furuno Electric Co Ltd filed Critical Furuno Electric Co Ltd
Priority to JP62155798A priority Critical patent/JPS64806A/en
Publication of JPH01806A publication Critical patent/JPH01806A/en
Publication of JPS64806A publication Critical patent/JPS64806A/en
Pending legal-status Critical Current

Links

Landscapes

  • Control Of Amplification And Gain Control (AREA)
  • Amplifiers (AREA)
  • Transmitters (AREA)

Abstract

PURPOSE: To prevent the occurrence of impedance mismatching in the output terminal by supplying the supply voltage, which is changed to linearly power- amplify an input signal, to a power amplifier.
CONSTITUTION: A CPU 20 reads out data of a DC voltage VCC corresponding to the level of an inputted audio signal and data of a control bias voltage Vb from a RAM 22 and outputs them to a data buffer memory 26 and a D/A converter 27. Data of the DC voltage VCC is temporarily stored in the memory 26 and is outputted to a programmable voltage source 5a, and the voltage source 5a outputs the DC voltage VCC corresponding to data to a power amplifier 4. Meanwhile, the converter 27 subjects data to D/A conversion to generate the control bias voltage Vb and outputs this voltage to a variable attenuator 8. Thus, the input signal is linearly amplified by the power amplifier 4, and consequently, the impedance mismatching state does not occur in the output terminal of the amplifier 4.
COPYRIGHT: (C)1989,JPO&Japio
JP62155798A 1987-06-23 1987-06-23 Power amplifier circuit device Pending JPS64806A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62155798A JPS64806A (en) 1987-06-23 1987-06-23 Power amplifier circuit device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62155798A JPS64806A (en) 1987-06-23 1987-06-23 Power amplifier circuit device

Publications (2)

Publication Number Publication Date
JPH01806A JPH01806A (en) 1989-01-05
JPS64806A true JPS64806A (en) 1989-01-05

Family

ID=15613673

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62155798A Pending JPS64806A (en) 1987-06-23 1987-06-23 Power amplifier circuit device

Country Status (1)

Country Link
JP (1) JPS64806A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04207211A (en) * 1990-11-28 1992-07-29 Sharp Corp Integrated circuit
JPH04277939A (en) * 1991-03-05 1992-10-02 Sharp Corp Antenna power controller
WO1998020621A1 (en) * 1996-11-01 1998-05-14 Ericsson Inc. Programmable voltage source
US11545941B2 (en) 2020-02-26 2023-01-03 Jose Mazini Tarifa Electronic system of active power control for automotive audio amplifiers

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04207211A (en) * 1990-11-28 1992-07-29 Sharp Corp Integrated circuit
JPH04277939A (en) * 1991-03-05 1992-10-02 Sharp Corp Antenna power controller
WO1998020621A1 (en) * 1996-11-01 1998-05-14 Ericsson Inc. Programmable voltage source
US11545941B2 (en) 2020-02-26 2023-01-03 Jose Mazini Tarifa Electronic system of active power control for automotive audio amplifiers

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