JPS5469049A - Overinput protective circuit for vhf/uhf power amplifier part - Google Patents

Overinput protective circuit for vhf/uhf power amplifier part

Info

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
Application number
JP13575177A
Other languages
Japanese (ja)
Inventor
Noriya Tanaka
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.)
Oki Electric Industry Co Ltd
Original Assignee
Oki Electric Industry 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 Oki Electric Industry Co Ltd filed Critical Oki Electric Industry Co Ltd
Priority to JP13575177A priority Critical patent/JPS5469049A/en
Publication of JPS5469049A publication Critical patent/JPS5469049A/en
Pending legal-status Critical Current

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
JP13575177A 1977-11-14 1977-11-14 Overinput protective circuit for vhf/uhf power amplifier part Pending JPS5469049A (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50134746A (en) * 1974-04-15 1975-10-25

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50134746A (en) * 1974-04-15 1975-10-25

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