JPS5779715A - Envelope detection circuit - Google Patents
Envelope detection circuitInfo
- 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
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.
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)
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 |
-
1980
- 1980-11-04 JP JP15505880A patent/JPS5779715A/en active Pending
Cited By (9)
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 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB1158416A (en) | Transistor Amplifier | |
ES421612A1 (en) | Circuit arrangement for electronic gain/control, in particular electronic volume control circuit | |
JPS5779715A (en) | Envelope detection circuit | |
GB1469990A (en) | Gain control circuit | |
JPS5483746A (en) | Amplifier circuit | |
JPS5544266A (en) | Rectifying circuit | |
JPS55115706A (en) | Push pull amplifier | |
JPS5728407A (en) | Amplifying circuit | |
GB802307A (en) | Improvements in or relating to electrical circuits utilizing transistors | |
JPS5779722A (en) | Automatic gain controlling circuit | |
GB909776A (en) | A transistor amplifier with gain control | |
JPS5711514A (en) | Automatic level controller | |
JPS55115708A (en) | Push pull amplifier | |
JPS5585115A (en) | Gain control and amplifying circuit | |
GB817417A (en) | Automatic gain control arrangements for transistor amplifiers | |
JPS55132113A (en) | Power amplifying circuit | |
GB765398A (en) | Improvements in or relating to transistor circuits having variable amplification | |
JPS55132115A (en) | Non-linear amplifier | |
JPS5634211A (en) | Agc muting circuit | |
GB865122A (en) | Improvements in or relating to automatic gain control circuit arrangements | |
JPS56162508A (en) | Amplitude wave detecting circuit | |
GB757214A (en) | Improvements in or relating to transistor amplifier circuits | |
JPS6451812A (en) | Agc circuit | |
GB1164380A (en) | Improvements relating to Hearing Aids for the Hard-of-Hearing. | |
JPS542040A (en) | Signal amplifying circuit |