SE8107496L - CIRCUIT FOR MODIFYING THE DYNAMIC AREA OF AN INPUT - Google Patents
CIRCUIT FOR MODIFYING THE DYNAMIC AREA OF AN INPUTInfo
- Publication number
- SE8107496L SE8107496L SE8107496A SE8107496A SE8107496L SE 8107496 L SE8107496 L SE 8107496L SE 8107496 A SE8107496 A SE 8107496A SE 8107496 A SE8107496 A SE 8107496A SE 8107496 L SE8107496 L SE 8107496L
- Authority
- SE
- Sweden
- Prior art keywords
- circuit
- stages
- signal
- modifying
- linear
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G7/00—Volume compression or expansion in amplifiers
- H03G7/06—Volume compression or expansion in amplifiers having semiconductor devices
- H03G7/08—Volume compression or expansion in amplifiers having semiconductor devices incorporating negative feedback
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G9/00—Combinations of two or more types of control, e.g. gain control and tone control
- H03G9/02—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers
- H03G9/025—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers frequency-dependent volume compression or expansion, e.g. multiple-band systems
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G7/00—Volume compression or expansion in amplifiers
- H03G7/002—Volume compression or expansion in amplifiers in untuned or low-frequency amplifiers, e.g. audio amplifiers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/62—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for providing a predistortion of the signal in the transmitter and corresponding correction in the receiver, e.g. for improving the signal/noise ratio
- H04B1/64—Volume compression or expansion arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
- Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
Abstract
An arrangement for modifying the dynamic range of an input signal has two series connected bi-linear stages with at least one cross connection feeding a signal component from one stage to the other stage to modify the action of the latter. In one embodiment a compressor has two bilinear stages 280 and 282, each with a linear main circuit path including an adding circuit (+) and a further path N1, N2 with non-linear characteristics providing a limited signal to the corresponding adding circuit, and a coupling circuit with transfer characteristic f(s) is connected to the output of the first further path N1 and injects a signal into the second further path N2 in order to improve such factors as reduction in noise modulation. A complementary arrangement applies to the expander 284, 286. In an alternative arrangement, the coupling circuit is a common control circuit for the series- connected compressor or expander stages, which reduces circuit complexity. <IMAGE>
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US32552981A | 1981-12-01 | 1981-12-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| SE8107496L true SE8107496L (en) | 1983-06-02 |
| SE449282B SE449282B (en) | 1987-04-13 |
Family
ID=23268266
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE8107496A SE449282B (en) | 1981-12-01 | 1981-12-15 | CIRCUIT FOR MODIFYING DYNAMIC AREA OF INCOMING INFORMATION SIGNALS |
Country Status (10)
| Country | Link |
|---|---|
| KR (1) | KR890000333B1 (en) |
| BE (1) | BE901907Q (en) |
| CA (1) | CA1177759A (en) |
| CH (1) | CH656270A5 (en) |
| DE (2) | DE3151213A1 (en) |
| FR (1) | FR2517495B1 (en) |
| GB (1) | GB2111356B (en) |
| MY (1) | MY8700931A (en) |
| NL (1) | NL192905C (en) |
| SE (1) | SE449282B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3343225A1 (en) * | 1983-11-30 | 1985-06-05 | Telefunken Fernseh Und Rundfunk Gmbh, 3000 Hannover | Broadcast radio receiving device |
| US4815068A (en) * | 1987-08-07 | 1989-03-21 | Dolby Ray Milton | Audio encoder for use with more than one decoder each having different characteristics |
| US4882761A (en) * | 1988-02-23 | 1989-11-21 | Resound Corporation | Low voltage programmable compressor |
| US4882762A (en) * | 1988-02-23 | 1989-11-21 | Resound Corporation | Multi-band programmable compression system |
| US5278912A (en) * | 1991-06-28 | 1994-01-11 | Resound Corporation | Multiband programmable compression system |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US28426A (en) * | 1860-05-22 | Shortening tires | ||
| US3903485A (en) * | 1968-01-10 | 1975-09-02 | Ray Milton Dolby | Compressors, expanders and noise reduction systems |
| US3846719A (en) * | 1973-09-13 | 1974-11-05 | Dolby Laboratories Inc | Noise reduction systems |
| USRE28426E (en) * | 1968-11-01 | 1975-05-20 | Signal compressors and expanders | |
| US3757254A (en) * | 1970-06-05 | 1973-09-04 | Victor Co Ltd | N system noise reduction system and apparatus using a compression and expansio |
| GB1390341A (en) * | 1971-03-12 | 1975-04-09 | Dolby Laboratories Inc | Signal compressors and expanders |
| US3875537A (en) * | 1972-05-02 | 1975-04-01 | Dolby Laboratories Inc | Circuits for modifying the dynamic range of an input signal |
| GB1432763A (en) * | 1972-05-02 | 1976-04-22 | Dolby Laboratories Inc | Compressors expanders and noise reduction systems |
| US3934190A (en) * | 1972-09-15 | 1976-01-20 | Dolby Laboratories, Inc. | Signal compressors and expanders |
| US3909733A (en) * | 1973-05-17 | 1975-09-30 | Dolby Laboratories Inc | Dynamic range modifying circuits utilizing variable negative resistance |
| JPS51127608A (en) * | 1975-04-30 | 1976-11-06 | Victor Co Of Japan Ltd | Signal transmitting unit |
| JPS5552971A (en) * | 1978-10-16 | 1980-04-17 | Mitsubishi Electric Corp | Simulator for radar indicator |
| BE889428A (en) * | 1980-06-30 | 1981-10-16 | Dolby Ray Milton | DEVICE FOR MODIFYING THE DYNAMIC RANGE OF INPUT SIGNALS |
| US4498060A (en) * | 1981-12-01 | 1985-02-05 | Dolby Ray Milton | Circuit arrangements for modifying dynamic range using series arranged bi-linear circuits |
-
1981
- 1981-12-09 GB GB08137168A patent/GB2111356B/en not_active Expired
- 1981-12-11 CA CA000392043A patent/CA1177759A/en not_active Expired
- 1981-12-15 SE SE8107496A patent/SE449282B/en not_active IP Right Cessation
- 1981-12-19 KR KR1019810005017A patent/KR890000333B1/en active
- 1981-12-22 CH CH8224/81A patent/CH656270A5/en not_active IP Right Cessation
- 1981-12-22 NL NL8105776A patent/NL192905C/en not_active IP Right Cessation
- 1981-12-23 DE DE19813151213 patent/DE3151213A1/en active Granted
- 1981-12-23 DE DE3153730A patent/DE3153730C2/de not_active Expired - Lifetime
- 1981-12-28 FR FR8124313A patent/FR2517495B1/en not_active Expired
-
1985
- 1985-03-08 BE BE0/214627A patent/BE901907Q/en not_active IP Right Cessation
-
1987
- 1987-12-30 MY MY931/87A patent/MY8700931A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| NL192905B (en) | 1997-12-01 |
| GB2111356A (en) | 1983-06-29 |
| FR2517495B1 (en) | 1985-11-15 |
| NL192905C (en) | 1998-04-02 |
| BE901907Q (en) | 1985-07-01 |
| DE3151213A1 (en) | 1983-06-09 |
| FR2517495A1 (en) | 1983-06-03 |
| CA1177759A (en) | 1984-11-13 |
| KR830008463A (en) | 1983-11-18 |
| DE3151213C2 (en) | 1992-11-19 |
| MY8700931A (en) | 1987-12-31 |
| GB2111356B (en) | 1985-03-20 |
| CH656270A5 (en) | 1986-06-13 |
| SE449282B (en) | 1987-04-13 |
| KR890000333B1 (en) | 1989-03-14 |
| DE3153730C2 (en) | 1992-10-29 |
| NL8105776A (en) | 1983-07-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| NAL | Patent in force |
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| NUG | Patent has lapsed |
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