JPS56153813A - Output current limiting circuit for high frequency power amplifier - Google Patents

Output current limiting circuit for high frequency power amplifier

Info

Publication number
JPS56153813A
JPS56153813A JP5552780A JP5552780A JPS56153813A JP S56153813 A JPS56153813 A JP S56153813A JP 5552780 A JP5552780 A JP 5552780A JP 5552780 A JP5552780 A JP 5552780A JP S56153813 A JPS56153813 A JP S56153813A
Authority
JP
Japan
Prior art keywords
circuit
high frequency
output
power amplifier
fluctuation
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
JP5552780A
Other languages
Japanese (ja)
Inventor
Tetsuo Yoshida
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 JP5552780A priority Critical patent/JPS56153813A/en
Publication of JPS56153813A publication Critical patent/JPS56153813A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G11/00—Limiting amplitude; Limiting rate of change of amplitude ; Clipping in general
    • H03G11/002—Limiting amplitude; Limiting rate of change of amplitude ; Clipping in general without controlling loop

Landscapes

  • Amplifiers (AREA)

Abstract

PURPOSE:To limit the output current of a power amplifier and increase the speed of response to the fluctuation of load impedance, by inserting a lambda/4 circuit between the power amplifier and the load and then providing an amplitude limiting circuit that limits the output voltage of the lambda/4 circuit. CONSTITUTION:A lambda/4 circuit 45 is inserted between the power amplifying circuit 43 and the output tuning circuit 46, and the input impedance has a fluctuation for the circuit 46 as the load impedance of the output terminal 50 has a fluctuation. As a result, the load impedance of circuit 45 also has a fluctuation. The high frequency transformer 47 and diode 48 form a high frequency rectifying circuit which functions as an amplitude limiting circuit. When the output voltage of the rectifying circuit is lower than the modulated voltage of terminal 41, the diodes 481 and 482 are cut off to give virtually no effect to the high frequency circuit. On the contrary, the output voltage of the said rectifying circuit is limited by the modulated voltage although the output voltage of circuit 45 is going to increase. Thus the input voltage of transformer 47, i.e. the output voltage of circuit 45 is limited. In other words, the output current of amplifier 43 is limited.
JP5552780A 1980-04-28 1980-04-28 Output current limiting circuit for high frequency power amplifier Pending JPS56153813A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5552780A JPS56153813A (en) 1980-04-28 1980-04-28 Output current limiting circuit for high frequency power amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5552780A JPS56153813A (en) 1980-04-28 1980-04-28 Output current limiting circuit for high frequency power amplifier

Publications (1)

Publication Number Publication Date
JPS56153813A true JPS56153813A (en) 1981-11-28

Family

ID=13001188

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5552780A Pending JPS56153813A (en) 1980-04-28 1980-04-28 Output current limiting circuit for high frequency power amplifier

Country Status (1)

Country Link
JP (1) JPS56153813A (en)

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