JPS5779715A - Envelope detection circuit - Google Patents

Envelope detection circuit

Info

Publication number
JPS5779715A
JPS5779715A JP15505880A JP15505880A JPS5779715A JP S5779715 A JPS5779715 A JP S5779715A JP 15505880 A JP15505880 A JP 15505880A JP 15505880 A JP15505880 A JP 15505880A JP S5779715 A JPS5779715 A JP S5779715A
Authority
JP
Japan
Prior art keywords
output
voltage
terminal
low
amplifying circuit
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
JP15505880A
Other languages
Japanese (ja)
Inventor
Kiyoshi Obata
Kinji Kawamoto
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP15505880A priority Critical patent/JPS5779715A/en
Publication of JPS5779715A publication Critical patent/JPS5779715A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D1/00—Demodulation of amplitude-modulated oscillations
    • H03D1/14—Demodulation of amplitude-modulated oscillations by means of non-linear elements having more than two poles
    • H03D1/18—Demodulation of amplitude-modulated oscillations by means of non-linear elements having more than two poles of semiconductor devices

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Abstract

PURPOSE:To decrease the voltage loss and to realize a low voltage operation, by providing an emitter common amplifying curcuit at an output terminal of a feedback amplifying circuit and smoothing the output of the emitter common amplifying circuit as an output and feeding it back. CONSTITUTION:An input signal is amplified with inversion at an operational amplifier 9 and inputted to a base of a common emitter amplifying circuit 13. An output picked up with a low impedance from the collector is outputted via a smoothing circuit 7 and fed back from the collector to the operational amplifier 9 via a transistor (TR) 17. A TR13 is conductive when the potential of an input terminal is positive and is cut off when negative. When the TR13 is conductive, charging is made to the smoothing circuit 17 and a voltage corresponding to the input voltage is obtained at a terminal 10. Since the output impedance of the TR13 is low, the charging time constat is dependent on a resistor 14.
JP15505880A 1980-11-04 1980-11-04 Envelope detection circuit Pending JPS5779715A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15505880A JPS5779715A (en) 1980-11-04 1980-11-04 Envelope detection circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15505880A JPS5779715A (en) 1980-11-04 1980-11-04 Envelope detection circuit

Publications (1)

Publication Number Publication Date
JPS5779715A true JPS5779715A (en) 1982-05-19

Family

ID=15597742

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15505880A Pending JPS5779715A (en) 1980-11-04 1980-11-04 Envelope detection circuit

Country Status (1)

Country Link
JP (1) JPS5779715A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58220506A (en) * 1982-06-16 1983-12-22 Mitsubishi Electric Corp Amplitude modulation detecting circuit
JPS62154805A (en) * 1985-12-26 1987-07-09 Sony Corp Peak detecting circuit
JP2007116694A (en) * 2005-10-17 2007-05-10 Korea Electronics Telecommun Power amplifier in high-efficiency mixed mode
EP3681037A1 (en) * 2019-01-14 2020-07-15 Stmicroelectronics Sa Electronic circuit for detecting an enclosure and corresponding demodulator

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58220506A (en) * 1982-06-16 1983-12-22 Mitsubishi Electric Corp Amplitude modulation detecting circuit
JPS62154805A (en) * 1985-12-26 1987-07-09 Sony Corp Peak detecting circuit
JPH0787300B2 (en) * 1985-12-26 1995-09-20 ソニー株式会社 Peak detection circuit
JP2007116694A (en) * 2005-10-17 2007-05-10 Korea Electronics Telecommun Power amplifier in high-efficiency mixed mode
EP3681037A1 (en) * 2019-01-14 2020-07-15 Stmicroelectronics Sa Electronic circuit for detecting an enclosure and corresponding demodulator
FR3091796A1 (en) * 2019-01-14 2020-07-17 Stmicroelectronics Sa Envelope detection electronic circuit and corresponding demodulator
US10951168B2 (en) 2019-01-14 2021-03-16 Stmicroelectronics Sa Electronic envelope detection circuit and corresponding demodulator
US11296654B2 (en) 2019-01-14 2022-04-05 Stmicroelectronics Sa Electronic envelope detection circuit and corresponding demodulator
EP4220944A1 (en) * 2019-01-14 2023-08-02 Stmicroelectronics Sa Electronic circuit for detecting an envelope and corresponding demodulator

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