GB668762A - Improvements in electronic circuit voltage control - Google Patents
Improvements in electronic circuit voltage controlInfo
- Publication number
- GB668762A GB668762A GB216/50A GB21650A GB668762A GB 668762 A GB668762 A GB 668762A GB 216/50 A GB216/50 A GB 216/50A GB 21650 A GB21650 A GB 21650A GB 668762 A GB668762 A GB 668762A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bridge
- diagonal
- potentiometer
- valve
- jan
- 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
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/02—Manually-operated control
- H03G3/04—Manually-operated control in untuned amplifiers
- H03G3/06—Manually-operated control in untuned amplifiers having discharge tubes
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Spectrometry And Color Measurement (AREA)
- Control Of Non-Electrical Variables (AREA)
- Investigating Or Analysing Biological Materials (AREA)
Abstract
668,762. Impedance networks. DU MONT LABORATORIES Inc., A. B. Jan. 4, 1950 [Jan. 15, 1949], No. 216/50. Class 40 (viii). [Also in Group XL (c)] A voltage gain control circuit comprises a number of resistances connected as a Wheatstone bridge, with the input applied to one diagonal, a potentiometer connected across the other diagonal and a reactance connected across one leg of the bridge. As shown, resistances R1, R2, R3, R4 are connected as a Wheatstone bridge in the cathode circuit of an amplifier valve 10. The input to the following valve 22 is taken from the moving contact of a potentiometer R5 connected across the diagonal of the bridge. A condenser 13 is connected across one leg of the bridge. The bridge is balanced for D.C. so that no objectionable disturbances arise from variations in the D.C. component fed to the following valve when the gain control is adjusted. The condenser 13 is chosen so that the junction of resistors R2, R3 and potentiometer R5 is earthed over the useful frequency band. The arrangement may be connected in the anode circuit of a valve.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US668762XA | 1949-01-15 | 1949-01-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB668762A true GB668762A (en) | 1952-03-19 |
Family
ID=22072274
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB216/50A Expired GB668762A (en) | 1949-01-15 | 1950-01-04 | Improvements in electronic circuit voltage control |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR1004035A (en) |
| GB (1) | GB668762A (en) |
-
1949
- 1949-12-28 FR FR1004035D patent/FR1004035A/en not_active Expired
-
1950
- 1950-01-04 GB GB216/50A patent/GB668762A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR1004035A (en) | 1952-03-25 |
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