JPS6442904A - High frequency power monitor - Google Patents

High frequency power monitor

Info

Publication number
JPS6442904A
JPS6442904A JP62199452A JP19945287A JPS6442904A JP S6442904 A JPS6442904 A JP S6442904A JP 62199452 A JP62199452 A JP 62199452A JP 19945287 A JP19945287 A JP 19945287A JP S6442904 A JPS6442904 A JP S6442904A
Authority
JP
Japan
Prior art keywords
drain current
amplifier
high frequency
frequency power
deviated
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
JP62199452A
Other languages
Japanese (ja)
Inventor
Takao Goto
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 JP62199452A priority Critical patent/JPS6442904A/en
Publication of JPS6442904A publication Critical patent/JPS6442904A/en
Pending legal-status Critical Current

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  • Amplifiers (AREA)

Abstract

PURPOSE:To detect instantly an abnormality of an amplifier by detecting a gate current being a bias of a FET and comparing it with a reference value. CONSTITUTION:A drain current detection circuit 2 detects a drain current at the operation of a high frequency power amplifier 1. The change in the drain current attended with the increase in the input power has a prescribed correla tion from the vicinity of the saturated point where the output power is deviated from the ideal characteristic especially, then it is stored in a comparison section 3 and when the drain current deviated from the desired operating range is detected, an alarm is raised by an alarm section 4. Thus, the output power of the amplifier 1 is monitored to enable to detect the abnormity.
JP62199452A 1987-08-10 1987-08-10 High frequency power monitor Pending JPS6442904A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62199452A JPS6442904A (en) 1987-08-10 1987-08-10 High frequency power monitor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62199452A JPS6442904A (en) 1987-08-10 1987-08-10 High frequency power monitor

Publications (1)

Publication Number Publication Date
JPS6442904A true JPS6442904A (en) 1989-02-15

Family

ID=16408048

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62199452A Pending JPS6442904A (en) 1987-08-10 1987-08-10 High frequency power monitor

Country Status (1)

Country Link
JP (1) JPS6442904A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0310598A (en) * 1989-06-08 1991-01-18 Kenwood Corp Alarm device in radio communication equipment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0310598A (en) * 1989-06-08 1991-01-18 Kenwood Corp Alarm device in radio communication equipment

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