JPS6442904A - High frequency power monitor - Google Patents
High frequency power monitorInfo
- 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
Links
Landscapes
- 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.
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0310598A (en) * | 1989-06-08 | 1991-01-18 | Kenwood Corp | Alarm device in radio communication equipment |
-
1987
- 1987-08-10 JP JP62199452A patent/JPS6442904A/en active Pending
Cited By (1)
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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