GB741326A - Improvements in or relating to d.c. amplifiers - Google Patents
Improvements in or relating to d.c. amplifiersInfo
- Publication number
- GB741326A GB741326A GB1127753A GB1127753A GB741326A GB 741326 A GB741326 A GB 741326A GB 1127753 A GB1127753 A GB 1127753A GB 1127753 A GB1127753 A GB 1127753A GB 741326 A GB741326 A GB 741326A
- Authority
- GB
- United Kingdom
- Prior art keywords
- amplifier
- input
- gain
- main
- resistor
- 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 1
- 230000000694 effects Effects 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
- 238000003199 nucleic acid amplification method Methods 0.000 abstract 1
- 230000000087 stabilizing effect Effects 0.000 abstract 1
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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Abstract
741,326. Discharge-tube amplifying circuits. SMITH & SONS (ENGLAND), Ltd., S. June 24, 1954 [April 23, 1953], No. 11277/53. Class 40 (6). In a D.C. amplifier comprising a main D.C.- coupled amplifier and an auxiliary amplifier for correcting drift, the latter is provided with an initial stage of magnetic amplification and positive feedback is provided between the output and input of the auxiliary amplifier. An input signal, Fig. 1, is applied over resistor 6 to a main D.C.-coupled amplifier 1 and also over an isolating resistor 10 to an auxiliary magnetic amplifier 9 fed from an A.C. source 12, preferably of about 10 kc/s. The output is applied over resistors 13, 14 as negative and positive feedback to the input of the amplifier 9 thus increasing the input impedance and stabilizing the forward gain of the auxiliary amplifier 9. The output from resistor 15 is added to the input signal in the first stage of the main amplifier so that the D.C. level is enhanced, higher frequencies being unaffected since the gain of amplifier 9 falls off rapidly with frequency. Since the overall gain of the circuit is determined by the negative feed-back resistors 5, 6 the effect of drift is reduced by a factor substantially equal to the gain of amplifier 9. In a modification, Fig. 2, resistors 17, 16 are arranged between the output and input of the main amplifier 1 having a ratio equal to the gain of the amplifier. The potential at point A is applied to the input side A of resistor 10. Any drift in potential causes a compensating potential to be applied to the first stage of the main amplifier 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1127753A GB741326A (en) | 1953-04-23 | 1953-04-23 | Improvements in or relating to d.c. amplifiers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1127753A GB741326A (en) | 1953-04-23 | 1953-04-23 | Improvements in or relating to d.c. amplifiers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB741326A true GB741326A (en) | 1955-11-30 |
Family
ID=9983257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1127753A Expired GB741326A (en) | 1953-04-23 | 1953-04-23 | Improvements in or relating to d.c. amplifiers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB741326A (en) |
-
1953
- 1953-04-23 GB GB1127753A patent/GB741326A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB755870A (en) | Improvements in or relating to transistor circuits | |
| GB732630A (en) | Improvements in or relating to negative feedback amplifiers | |
| GB1101488A (en) | Improvements in and relating to electric signal amplifiers | |
| GB741326A (en) | Improvements in or relating to d.c. amplifiers | |
| GB610105A (en) | Negative feedback amplifier | |
| US3176236A (en) | Drift stabilized amplifier | |
| GB853672A (en) | Improvements in or relating to transistor amplifiers | |
| GB809207A (en) | Improvements in and relating to transistor amplifiers | |
| GB721550A (en) | Improvements in or relating to gain control circuit arrangements | |
| GB662677A (en) | Phase inverter system | |
| GB760257A (en) | Improvements in or relating to feed-back amplifiers | |
| GB677126A (en) | Improvements relating to thermionic valve amplifiers in television apparatus | |
| GB1420936A (en) | Gain control arrangements | |
| GB753079A (en) | Improvements in transistor amplifiers | |
| GB1111571A (en) | Differential current amplifier | |
| GB1389715A (en) | Transistor amplifiers | |
| GB953406A (en) | Improvements in or relating to amplifiers for single sideband radio signals | |
| JPS5447557A (en) | Power amplifier | |
| GB660193A (en) | Improvements in and relating to electronic amplifiers | |
| GB870922A (en) | Improvements in or relating to delayed automatic gain control arrangements for transistor amplifier | |
| GB803098A (en) | Improvements in or relating to audio frequency transistor amplifiers | |
| GB584475A (en) | Improvements in or relating to electrical amplifiers | |
| GB716442A (en) | Improvements relating to thermionic valve circuits | |
| JPS57190464A (en) | Non-addition mixing circuit | |
| GB638823A (en) | Improvements in or relating to thermionic valve amplifiers |