GB451535A - Improvements in or relating to electron discharge device amplifiers - Google Patents
Improvements in or relating to electron discharge device amplifiersInfo
- Publication number
- GB451535A GB451535A GB1793035A GB1793035A GB451535A GB 451535 A GB451535 A GB 451535A GB 1793035 A GB1793035 A GB 1793035A GB 1793035 A GB1793035 A GB 1793035A GB 451535 A GB451535 A GB 451535A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bridge
- sliders
- resistances
- knob
- bias voltage
- 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
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/34—DC amplifiers in which all stages are DC-coupled
- H03F3/36—DC amplifiers in which all stages are DC-coupled with tubes only
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Abstract
451,535. Control systems for discharge lamps. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., Electra House, Victoria Embankment, London, and KEALL, O. E., 32, Rainsford Avenue, Chelmsford. June 21, 1935, No. 17930. [Class 38 (iv)] [See also Group XL] Variable - grid bias voltage for a D.C. amplifier is derived from a source of potential A, by means of a Wheatstone bridge circuit B, C, which is set slightly out of balance, the bias voltage GB being taken by a slider D<1> on a resistance D in a diagonal of the bridge and through which flows the out-of-balance current. In the arrangement shown in Fig. 1, the two sliders B1, C1, on the resistances B, C are gangcontrolled from the knob HBC in such manner that for all positions of the knob the bridge is slightly unbalanced ; alternatively the necessary unbalance may be obtained by an additional resistance between adjacent ends of resistances BC. A predetermined small amount of backlash may be introduced into the mechanical connection of sliders B1, C1. The arrangement is particularly applicable to direct current amplifiers in electro-cardiographs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1793035A GB451535A (en) | 1935-06-21 | 1935-06-21 | Improvements in or relating to electron discharge device amplifiers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1793035A GB451535A (en) | 1935-06-21 | 1935-06-21 | Improvements in or relating to electron discharge device amplifiers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB451535A true GB451535A (en) | 1936-08-07 |
Family
ID=10103730
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1793035A Expired GB451535A (en) | 1935-06-21 | 1935-06-21 | Improvements in or relating to electron discharge device amplifiers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB451535A (en) |
-
1935
- 1935-06-21 GB GB1793035A patent/GB451535A/en not_active Expired
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