GB329747A - Improvements in thermionic or like amplifiers - Google Patents
Improvements in thermionic or like amplifiersInfo
- Publication number
- GB329747A GB329747A GB894929A GB894929A GB329747A GB 329747 A GB329747 A GB 329747A GB 894929 A GB894929 A GB 894929A GB 894929 A GB894929 A GB 894929A GB 329747 A GB329747 A GB 329747A
- Authority
- GB
- United Kingdom
- Prior art keywords
- condensers
- inputs
- amplification
- modification
- input
- 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
- 230000003321 amplification Effects 0.000 abstract 2
- 230000004048 modification Effects 0.000 abstract 2
- 238000012986 modification Methods 0.000 abstract 2
- 238000003199 nucleic acid amplification method Methods 0.000 abstract 2
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/02—Manually-operated control
- H03G3/14—Manually-operated control in frequency-selective amplifiers
- H03G3/16—Manually-operated control in frequency-selective amplifiers having discharge tubes
Landscapes
- Amplifiers (AREA)
Abstract
329,747. Voigt, P. G. A. H. March 20, 1929. Systems for transmitting music. - The amplification of a low frequency amplifier is controlled by the relative values of two or more condensers arranged to form a potentiometer type of input. In a modification the circuit is arranged to combine in pre-determined proportions energy from a number of sources. Fig. 2 shows condensers C, D arranged to control the amplification with resistances F, M, arranged to prevent noise due to direct current voltage across the variable condenser C. The condensers are preferably ganged and the plates may be shaped to obtain control according to any desired law. In a modification (Fig. 3, not shown) a number of inputs with a corresponding number of condensers C are employed to enable the inputs from a number of microphones to be mixed. Fig. 4 shows a system having two inputs A1, B1, A2, B2, and a condenser having three fixed plates C1, C2, D and a moving plate V adapted to permit either input to be " faded in " or the addition of the inputs in any desired proportions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB894929A GB329747A (en) | 1929-03-20 | 1929-03-20 | Improvements in thermionic or like amplifiers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB894929A GB329747A (en) | 1929-03-20 | 1929-03-20 | Improvements in thermionic or like amplifiers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB329747A true GB329747A (en) | 1930-05-29 |
Family
ID=9862434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB894929A Expired GB329747A (en) | 1929-03-20 | 1929-03-20 | Improvements in thermionic or like amplifiers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB329747A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2790970A (en) * | 1951-01-04 | 1957-04-30 | Sprague Electric Co | Audio frequency signal transfer control circuits |
| GB2317529A (en) * | 1996-09-04 | 1998-03-25 | Michael Holdsworth | Microphone/audio mixer |
-
1929
- 1929-03-20 GB GB894929A patent/GB329747A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2790970A (en) * | 1951-01-04 | 1957-04-30 | Sprague Electric Co | Audio frequency signal transfer control circuits |
| GB2317529A (en) * | 1996-09-04 | 1998-03-25 | Michael Holdsworth | Microphone/audio mixer |
| GB2317529B (en) * | 1996-09-04 | 2000-11-15 | Michael Holdsworth | Microphone/audio mixer |
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