JPS57211835A - Automatic electric power controlling circuit for transmitter - Google Patents

Automatic electric power controlling circuit for transmitter

Info

Publication number
JPS57211835A
JPS57211835A JP9595681A JP9595681A JPS57211835A JP S57211835 A JPS57211835 A JP S57211835A JP 9595681 A JP9595681 A JP 9595681A JP 9595681 A JP9595681 A JP 9595681A JP S57211835 A JPS57211835 A JP S57211835A
Authority
JP
Japan
Prior art keywords
electric power
power controlling
amplifier
detector
automatic electric
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
JP9595681A
Other languages
Japanese (ja)
Inventor
Hiroshi Haga
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.)
Kokusai Electric Corp
Original Assignee
Kokusai Electric Corp
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 Kokusai Electric Corp filed Critical Kokusai Electric Corp
Priority to JP9595681A priority Critical patent/JPS57211835A/en
Publication of JPS57211835A publication Critical patent/JPS57211835A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3036—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers
    • H03G3/3042—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers in modulators, frequency-changers, transmitters or power amplifiers

Landscapes

  • Transmitters (AREA)

Abstract

PURPOSE:To produce a stable automatic electric power controlling circuit by expanding the dynamic range of a detector in an automatic electric power controlling loop. CONSTITUTION:A transmitting electric power amplifier 11 is biased in linear operation status close to class B or AB and a part of the output of said amplifier is supplied to a variable attenuator 14 through a directional coupler 13. The variable attenuator 14 is constituted by a series circuit consisting of PIN diodes and the quantity of attenuation is determined by the values of resistances R1, R2-Rn in an output setting part 18. An output from the attenuator 14 is fed back to a gain variable amplifier 12 like a loop through an amplifier 15, an detector 16 and a comparator 17. Consequently, the dynamic range of the detector 16 is equivalently expanded, so that the stability of the transmitting electric power controlling loop system depends upon only the frequency responce of the loop system and is not affected by temperature change or the like.
JP9595681A 1981-06-23 1981-06-23 Automatic electric power controlling circuit for transmitter Pending JPS57211835A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9595681A JPS57211835A (en) 1981-06-23 1981-06-23 Automatic electric power controlling circuit for transmitter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9595681A JPS57211835A (en) 1981-06-23 1981-06-23 Automatic electric power controlling circuit for transmitter

Publications (1)

Publication Number Publication Date
JPS57211835A true JPS57211835A (en) 1982-12-25

Family

ID=14151687

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9595681A Pending JPS57211835A (en) 1981-06-23 1981-06-23 Automatic electric power controlling circuit for transmitter

Country Status (1)

Country Link
JP (1) JPS57211835A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59127346U (en) * 1983-02-17 1984-08-27 八重洲無線株式会社 Transmitter automatic output limit circuit
JPS61214825A (en) * 1985-03-20 1986-09-24 Nec Corp High frequency power amplifying circuit
EP0481741A2 (en) * 1990-10-18 1992-04-22 Hitachi, Ltd. High frequency power amplifier circuit and mobile radio communication apparatus using the same
FR2690021A1 (en) * 1992-04-14 1993-10-15 Alcatel Telspace Digital word amplifier for personal communications network - has feedback loop controlling dynamic range together with secondary attenuator before loop detector controlled by burst input
EP0978971A1 (en) * 1998-08-06 2000-02-09 Alps Electric Co., Ltd. QPSK modulation signal receiving unit

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5293209A (en) * 1976-02-02 1977-08-05 Hitachi Denshi Ltd Control system of sending power

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5293209A (en) * 1976-02-02 1977-08-05 Hitachi Denshi Ltd Control system of sending power

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59127346U (en) * 1983-02-17 1984-08-27 八重洲無線株式会社 Transmitter automatic output limit circuit
JPH042507Y2 (en) * 1983-02-17 1992-01-28
JPS61214825A (en) * 1985-03-20 1986-09-24 Nec Corp High frequency power amplifying circuit
JPH0446491B2 (en) * 1985-03-20 1992-07-30 Nippon Electric Co
EP0481741A2 (en) * 1990-10-18 1992-04-22 Hitachi, Ltd. High frequency power amplifier circuit and mobile radio communication apparatus using the same
FR2690021A1 (en) * 1992-04-14 1993-10-15 Alcatel Telspace Digital word amplifier for personal communications network - has feedback loop controlling dynamic range together with secondary attenuator before loop detector controlled by burst input
EP0978971A1 (en) * 1998-08-06 2000-02-09 Alps Electric Co., Ltd. QPSK modulation signal receiving unit
US6631171B1 (en) 1998-08-06 2003-10-07 Alps Electric Co., Ltd. QPSK modulation signal receiving unit

Similar Documents

Publication Publication Date Title
CA2015553A1 (en) Radio transmitter capable of compensating for a frequency characteristic of an antenna and/or a coupling circuit
TW216471B (en)
GB1425742A (en) Heat treatment apparatus and method
GB1526636A (en) Circuit for automatic dynamic compression or expansion
JPS57211835A (en) Automatic electric power controlling circuit for transmitter
ATE108960T1 (en) VOLTAGE CONTROLLED OSCILLATOR.
JPS56165410A (en) High frequency transistor amplifying circuit
JPS54111070A (en) Phase controlling circuit
JPS5678207A (en) Line amplifier
JPS5366143A (en) Power amplifier circuit
JPS5745708A (en) Amplifying circuit
JPS53148379A (en) Gain control unit
JPS56131215A (en) Tuner
JPS5762609A (en) Gain control amplifier
JPS5561113A (en) Ultra-high frequency band negative feedback amplifier
JPS57141114A (en) Output characteristic control circuit of amplifier
JPS57162506A (en) Automatic gain controlling system
JPS573409A (en) Agc circuit
JPS647806A (en) Amplitude compressing/expanding circuit
JPS5614967A (en) Automatic gain control circuit of radar receiver
JPS5739632A (en) Signal compressor
JPS5678209A (en) Control amplifier
JPS57152207A (en) Variable gain amplifying circuit
JPS5371554A (en) Circuit supervisory amplifier circuit
JPS6410736A (en) Transmitter-receiver