GB1473832A - Circuit for the dynamic range of a signal - Google Patents
Circuit for the dynamic range of a signalInfo
- Publication number
- GB1473832A GB1473832A GB5014376A GB5014376A GB1473832A GB 1473832 A GB1473832 A GB 1473832A GB 5014376 A GB5014376 A GB 5014376A GB 5014376 A GB5014376 A GB 5014376A GB 1473832 A GB1473832 A GB 1473832A
- Authority
- GB
- United Kingdom
- Prior art keywords
- dynamic range
- impedance
- voltage
- circuit
- variable
- 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.)
- Expired
Links
Classifications
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
- Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
Abstract
1473832 Companders DOLBY LABORATORIES Inc 13 May 1974 [17 May 1973] 50143/76 Divided out of 1473831 Heading H4R The Specification repeats the description in the parent Specification 1,473,831 but relates to a circuit for modifying the dynamic range of an input signal comprising a series connection of a dynamic range linear impedance including a resistor, and a two terminal variable impedance (Fig. 9) including a frequency selective circuit responsive to the current in that impedance to introduce a voltage across it, the frequency selective circuit comprising a fixed high pass filter (C 1 R 1 ) and a variable high pass filter (C 2 R v ) and the variable characteristics operating so as to restrict the introduced voltage to one tenth of the voltage across the dynamic range linear impedance at maximum input signal level. A limiter in the form of antiparallel diodes may be included in the control loop to limit overshoot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5014376A GB1473832A (en) | 1973-05-17 | 1974-05-13 | Circuit for the dynamic range of a signal |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2363873A GB1473831A (en) | 1973-05-17 | 1973-05-17 | |
| GB5014376A GB1473832A (en) | 1973-05-17 | 1974-05-13 | Circuit for the dynamic range of a signal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1473832A true GB1473832A (en) | 1977-05-18 |
Family
ID=26256642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5014376A Expired GB1473832A (en) | 1973-05-17 | 1974-05-13 | Circuit for the dynamic range of a signal |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1473832A (en) |
-
1974
- 1974-05-13 GB GB5014376A patent/GB1473832A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PE20 | Patent expired after termination of 20 years |
Effective date: 19940512 |