JPS5255415A - Anti-side tone circuit - Google Patents
Anti-side tone circuitInfo
- Publication number
- JPS5255415A JPS5255415A JP13112175A JP13112175A JPS5255415A JP S5255415 A JPS5255415 A JP S5255415A JP 13112175 A JP13112175 A JP 13112175A JP 13112175 A JP13112175 A JP 13112175A JP S5255415 A JPS5255415 A JP S5255415A
- Authority
- JP
- Japan
- Prior art keywords
- input terminal
- reception signal
- side tone
- amplifier
- tone 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/58—Anti-side-tone circuits
- H04M1/585—Anti-side-tone circuits implemented without inductive element
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
Abstract
PURPOSE:The impedance inserted into output terminal of arithmetic amplifier, inversion input terminal, earth, and transmission signal input terminal respectively is adjusted. In this way, the gain is increased when reception signal is transmitted to reception signal detection circuit. At the same time, application is successfully ensured for the telephone circuit inculuding amplifier.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13112175A JPS5255415A (en) | 1975-10-31 | 1975-10-31 | Anti-side tone circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13112175A JPS5255415A (en) | 1975-10-31 | 1975-10-31 | Anti-side tone circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5255415A true JPS5255415A (en) | 1977-05-06 |
JPS5426446B2 JPS5426446B2 (en) | 1979-09-04 |
Family
ID=15050466
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13112175A Granted JPS5255415A (en) | 1975-10-31 | 1975-10-31 | Anti-side tone circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5255415A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57109450A (en) * | 1980-12-26 | 1982-07-07 | Masao Uchiumi | Howling preventing circuit for telephone set callable by loudspeaker |
US4414432A (en) * | 1981-09-21 | 1983-11-08 | Zenith Radio Corporation | Pseudo-full duplex television/telephone loudspeaker system |
-
1975
- 1975-10-31 JP JP13112175A patent/JPS5255415A/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57109450A (en) * | 1980-12-26 | 1982-07-07 | Masao Uchiumi | Howling preventing circuit for telephone set callable by loudspeaker |
US4414432A (en) * | 1981-09-21 | 1983-11-08 | Zenith Radio Corporation | Pseudo-full duplex television/telephone loudspeaker system |
Also Published As
Publication number | Publication date |
---|---|
JPS5426446B2 (en) | 1979-09-04 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS5571400A (en) | Monolithic power ic and acoustic unit | |
ES8105125A1 (en) | Circuits and processes for initializing the loop current of a telephone set. | |
ES422597A1 (en) | Method and apparatus for amplifying signal transmission through transmission lines | |
JPS5255415A (en) | Anti-side tone circuit | |
JPS5323254A (en) | Amplifier equipment | |
JPS5252514A (en) | 2-frequency mixer circuit | |
FR2312145A1 (en) | Telephone interface unit for conferences - generates signals representing transmission signals and has differential amplifiers | |
JPS57145500A (en) | Reverberation sound adder | |
JPS5245804A (en) | Telephone memo recording method | |
ES8204893A1 (en) | Amplifier arrangement with very low distortion | |
JPS5367305A (en) | Receiver circuit | |
JPS53138261A (en) | Integrated circuit device | |
JPS5325338A (en) | Aural amplifier | |
JPS5436156A (en) | Hybrid junction circuit | |
JPS54152414A (en) | Squelch system of fm mobile radio equipment | |
JPS51114046A (en) | Block average circuit | |
JPS5483735A (en) | Coupled circuit | |
JPS5244105A (en) | Stereo demodulator circuit | |
JPS5252613A (en) | Sound signal regenerating device | |
JPS5256809A (en) | Reception frequency converter | |
SU1840676A1 (en) | Submarine emulator | |
JPS5244106A (en) | Multi-frequency signal receiver | |
JPS5353203A (en) | Amplifier | |
JPS529309A (en) | Muting circuit for fm receiver | |
JPS5489412A (en) | Two-way amplifier |