JPS5492158A - Amplifier circuit - Google Patents

Amplifier circuit

Info

Publication number
JPS5492158A
JPS5492158A JP16029477A JP16029477A JPS5492158A JP S5492158 A JPS5492158 A JP S5492158A JP 16029477 A JP16029477 A JP 16029477A JP 16029477 A JP16029477 A JP 16029477A JP S5492158 A JPS5492158 A JP S5492158A
Authority
JP
Japan
Prior art keywords
output
input
amplifier
terminal
power
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
JP16029477A
Other languages
Japanese (ja)
Other versions
JPS6143888B2 (en
Inventor
Takuro Oguchi
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP16029477A priority Critical patent/JPS5492158A/en
Publication of JPS5492158A publication Critical patent/JPS5492158A/en
Publication of JPS6143888B2 publication Critical patent/JPS6143888B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Amplifiers (AREA)

Abstract

PURPOSE: To switch a RF signal efficiently without using an alternation switch utilizing that the input-output impdeance of a through-type amplifier varies at the power cutting-off time, by connecting three-port circulators to input and output terminals.
CONSTITUTION: In the system which reduced the power consumption of a radio equipment by decreasing a transmission output under specific conditions, a RF signal inputted from terminal 11 is inputted at a normal operation time to through- type amplifire 15, applied with the required voltage from power terminal 17, via circulator 12 and amplified before being outputted from terminal 21 via circulator 19. On the other hand, when the power supply is turned off by opening switch 16, input and output impedence values of amplifier 15 differ remarkably from those of lines 14 and 18 and the input RF signal reflects in amplifier 15, passes through isolator 22 with a low loss, and reflects again at the output side of amplifier 15, so that it will appear at output terminal 21 via circulator 19. The power consumption is therefore reduced and signals are passed with a low loss.
COPYRIGHT: (C)1979,JPO&Japio
JP16029477A 1977-12-29 1977-12-29 Amplifier circuit Granted JPS5492158A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16029477A JPS5492158A (en) 1977-12-29 1977-12-29 Amplifier circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16029477A JPS5492158A (en) 1977-12-29 1977-12-29 Amplifier circuit

Publications (2)

Publication Number Publication Date
JPS5492158A true JPS5492158A (en) 1979-07-21
JPS6143888B2 JPS6143888B2 (en) 1986-09-30

Family

ID=15711855

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16029477A Granted JPS5492158A (en) 1977-12-29 1977-12-29 Amplifier circuit

Country Status (1)

Country Link
JP (1) JPS5492158A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007251395A (en) * 2006-03-14 2007-09-27 Yagi Antenna Co Ltd Gain variable high frequency amplifier

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0441280U (en) * 1990-08-03 1992-04-08

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5370745A (en) * 1976-12-06 1978-06-23 Western Electric Co Microwave amplifying circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5370745A (en) * 1976-12-06 1978-06-23 Western Electric Co Microwave amplifying circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007251395A (en) * 2006-03-14 2007-09-27 Yagi Antenna Co Ltd Gain variable high frequency amplifier

Also Published As

Publication number Publication date
JPS6143888B2 (en) 1986-09-30

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