GB849244A - Improvements in or relating to d.c. amplifiers - Google Patents
Improvements in or relating to d.c. amplifiersInfo
- Publication number
- GB849244A GB849244A GB909958A GB909958A GB849244A GB 849244 A GB849244 A GB 849244A GB 909958 A GB909958 A GB 909958A GB 909958 A GB909958 A GB 909958A GB 849244 A GB849244 A GB 849244A
- Authority
- GB
- United Kingdom
- Prior art keywords
- contact
- output
- amplifier
- input
- switch
- 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
- H03F3/38—Dc amplifiers with modulator at input and demodulator at output; Modulators or demodulators specially adapted for use in such amplifiers
- H03F3/40—Dc amplifiers with modulator at input and demodulator at output; Modulators or demodulators specially adapted for use in such amplifiers with tubes only
Abstract
849,244. Valve amplifying circuits. MARCONI'S WIRELESS TELEGRAPH CO. Ltd. Jan. 26, 1959 [March 27, 1958], No. 9909/58. Class 40(6). In a direct-current amplifier of the "chopper" type, in which a vibratory switch 7 alternately connects the input of an A.C. amplifier 10 to an input contact 5 and earthed contact 6, and a second synchronized switch 12 connects the amplifier output either to output contact 14 or to earthed contact 13, the condenser 16 across which the output is obtained is connected to contact 14 via a non-linear resistor 15 of the siliconcarbide type. The arrangement is such as to reduce the ripple in the output, since the resistance of resistor 15 is very high when contact 14 is isolated, so that the leakage current from condenser 16 over the switch contacts is minimized The voltage across condenser 16 is amplified in a D.C. amplifier 17; negative feedback is applied overall by connecting a potentiometer network 3, 4 between the input and output terminals 1, 2 respectively, the input contact 5 of the switch 7 being connected to the tapping point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB909958A GB849244A (en) | 1958-03-27 | 1958-03-27 | Improvements in or relating to d.c. amplifiers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB909958A GB849244A (en) | 1958-03-27 | 1958-03-27 | Improvements in or relating to d.c. amplifiers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB849244A true GB849244A (en) | 1960-09-21 |
Family
ID=9865324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB909958A Expired GB849244A (en) | 1958-03-27 | 1958-03-27 | Improvements in or relating to d.c. amplifiers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB849244A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1225708B (en) * | 1964-01-18 | 1966-09-29 | Telefunken Patent | Arrangement to reduce the recovery time of a chopper-stabilized computing amplifier after overdriving |
| US3649924A (en) * | 1970-03-02 | 1972-03-14 | Gordon Eng Co | Sampling amplifier |
-
1958
- 1958-03-27 GB GB909958A patent/GB849244A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1225708B (en) * | 1964-01-18 | 1966-09-29 | Telefunken Patent | Arrangement to reduce the recovery time of a chopper-stabilized computing amplifier after overdriving |
| US3649924A (en) * | 1970-03-02 | 1972-03-14 | Gordon Eng Co | Sampling amplifier |
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