JPS5469049A - Overinput protective circuit for vhf/uhf power amplifier part - Google Patents
Overinput protective circuit for vhf/uhf power amplifier partInfo
- Publication number
- JPS5469049A JPS5469049A JP13575177A JP13575177A JPS5469049A JP S5469049 A JPS5469049 A JP S5469049A JP 13575177 A JP13575177 A JP 13575177A JP 13575177 A JP13575177 A JP 13575177A JP S5469049 A JPS5469049 A JP S5469049A
- Authority
- JP
- Japan
- Prior art keywords
- overinput
- power amplifier
- amplifier part
- turned
- output
- 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
- Control Of Amplification And Gain Control (AREA)
- Amplifiers (AREA)
Abstract
PURPOSE: To shield the transistor used at the power amplifier part of the repeating amplifier from the breakdown cuased by the overinput by providing the wind comparator.
CONSTITUTION: Input 1 signal is detected (3) and then applied to wind comparator C8. As the output of circuit 3 is usually set to be between voltage V1 and V2, WC8 produces the output and relay 5 is driven to apply the bias voltage via delay circuit 6. Then diode switch DS2 is turned on, and the input signal is applied to the power amplifier part. In this instant, the overinput is prevented at the AGC starting time via the action of delay circuit 6. Then the level of the input signal rised up further, and the input voltage of WC8 exceeds V2. Thus, the output is turned off and accordingly DS2 is also turned off to prevent the overinput from being given to the power amplifier part.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13575177A JPS5469049A (en) | 1977-11-14 | 1977-11-14 | Overinput protective circuit for vhf/uhf power amplifier part |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13575177A JPS5469049A (en) | 1977-11-14 | 1977-11-14 | Overinput protective circuit for vhf/uhf power amplifier part |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5469049A true JPS5469049A (en) | 1979-06-02 |
Family
ID=15159007
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13575177A Pending JPS5469049A (en) | 1977-11-14 | 1977-11-14 | Overinput protective circuit for vhf/uhf power amplifier part |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5469049A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50134746A (en) * | 1974-04-15 | 1975-10-25 |
-
1977
- 1977-11-14 JP JP13575177A patent/JPS5469049A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50134746A (en) * | 1974-04-15 | 1975-10-25 |
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