JPS5528629A - Power amplifier - Google Patents

Power amplifier

Info

Publication number
JPS5528629A
JPS5528629A JP10185378A JP10185378A JPS5528629A JP S5528629 A JPS5528629 A JP S5528629A JP 10185378 A JP10185378 A JP 10185378A JP 10185378 A JP10185378 A JP 10185378A JP S5528629 A JPS5528629 A JP S5528629A
Authority
JP
Japan
Prior art keywords
input
given
transistor
signal
power 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
JP10185378A
Other languages
Japanese (ja)
Other versions
JPH0156581B2 (en
Inventor
Eiichi Matsumura
Haruo Niki
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
NEC Engineering Ltd
Original Assignee
NEC Corp
NEC Engineering Ltd
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, NEC Engineering Ltd, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP10185378A priority Critical patent/JPS5528629A/en
Publication of JPS5528629A publication Critical patent/JPS5528629A/en
Publication of JPH0156581B2 publication Critical patent/JPH0156581B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Radio Transmission System (AREA)
  • Electronic Switches (AREA)
  • Transceivers (AREA)

Abstract

PURPOSE:To enable to easily select the input signal source, by providing the electronic switch selecting two input signal sources to the input of the power amplifiers. CONSTITUTION:When the control voltage given to the terminal A is lower than the voltage Vs determined with the resistors R4 and R5, the transistor Q1 is OFF and the transistor Q4 is ON. A positive voltage is appeared at the base of the input selection transistor Q6 and it is OFF. The DC level of the base of other input selection transistor Q5 is about 0 to turn ON the transistor Q5. Accordingly, the signal of the signal source S1 is given to the input of the power amplifier PA. When the control voltage given to the terminal A is lower than Vs, the signal of the signal source S2 is given to the power amplifier PA. Accordingly, since the selection of inputs can be easily realized with one bit signal given to the terminal A, the selection switch can be simplified.
JP10185378A 1978-08-23 1978-08-23 Power amplifier Granted JPS5528629A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10185378A JPS5528629A (en) 1978-08-23 1978-08-23 Power amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10185378A JPS5528629A (en) 1978-08-23 1978-08-23 Power amplifier

Publications (2)

Publication Number Publication Date
JPS5528629A true JPS5528629A (en) 1980-02-29
JPH0156581B2 JPH0156581B2 (en) 1989-11-30

Family

ID=14311589

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10185378A Granted JPS5528629A (en) 1978-08-23 1978-08-23 Power amplifier

Country Status (1)

Country Link
JP (1) JPS5528629A (en)

Also Published As

Publication number Publication date
JPH0156581B2 (en) 1989-11-30

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