GB421516A - Improvements in or relating to thermionic valve amplifier and like electrical circuit arrangements - Google Patents
Improvements in or relating to thermionic valve amplifier and like electrical circuit arrangementsInfo
- Publication number
- GB421516A GB421516A GB20382/34A GB2038234A GB421516A GB 421516 A GB421516 A GB 421516A GB 20382/34 A GB20382/34 A GB 20382/34A GB 2038234 A GB2038234 A GB 2038234A GB 421516 A GB421516 A GB 421516A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- control frequency
- frequency
- grid
- characteristic
- 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
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/34—Negative-feedback-circuit arrangements with or without positive feedback
- H03F1/36—Negative-feedback-circuit arrangements with or without positive feedback in discharge-tube amplifiers
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Voltage And Current In General (AREA)
Abstract
421,516. Valve amplifying circuits. SIEMENS & HALSKE AKT.-GES., Siemensstadt, Berlin. July 11, 1934, No. 20382. Convention date, July 11, 1933. [Class 40 (v)] Distortion in thermionic amplifiers due to curved operating characteristics is eliminated by injecting into the amplifier input an auxiliary frequency higher than the highest working frequency and of small amplitude compared with the curvature of the characteristic, this amplified control frequency being then utilized to correct the curvilinear distortion. In Fig. 2 the curved characteristic of the valve V is rectified by impressing on the grid an auxiliary frequency from St which is restricted in amplitude in the anode circuit by the network R, C, L1, rectified at G1 and transferred through potentiometer R1 to vary the grid bias of V directly in proportion to the curvilinear distortion produced, and in the opposing sense ; this follows since the amplification of the control frequency will vary with the momentary value of the signal input due to curvature of characteristic. The compensating voltage may be applied to a preceding stage provided that the latter has a straight characteristic ; or the valve to which compensating voltage is fed back may act as a variable resistance across the input of V or in shunt to the load B, or in series with either circuit; alternatively a coupling impedance may be varied. The auxiliary control frequency may be generated by back coupling the anode of the valve to a second grid in the valve V. A compensating system independent of variation in applied control frequency is shown in Fig. 3, S being the network to be corrected, E the signal input, B the output, and St the control frequency. The amplified control frequency is applied through potentiometer P1 rectifier G12 and potentiometer P2 to the outer grid of the control valve SR, the inner grid being fed directly by rectified control frequency. The compensating voltage is derived from the anode resistance RW and applied, as previously described, for correction of S.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE421516X | 1933-07-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB421516A true GB421516A (en) | 1934-12-21 |
Family
ID=6458397
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB20382/34A Expired GB421516A (en) | 1933-07-11 | 1934-07-11 | Improvements in or relating to thermionic valve amplifier and like electrical circuit arrangements |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR775432A (en) |
GB (1) | GB421516A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2835747A (en) * | 1953-03-23 | 1958-05-20 | Philips Corp | Magnetic or dielectric amplifier |
US3263181A (en) * | 1961-07-10 | 1966-07-26 | Philips Corp | Circuit for adjusting volume and compression of a signal |
-
1934
- 1934-07-07 FR FR775432D patent/FR775432A/en not_active Expired
- 1934-07-11 GB GB20382/34A patent/GB421516A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2835747A (en) * | 1953-03-23 | 1958-05-20 | Philips Corp | Magnetic or dielectric amplifier |
US3263181A (en) * | 1961-07-10 | 1966-07-26 | Philips Corp | Circuit for adjusting volume and compression of a signal |
Also Published As
Publication number | Publication date |
---|---|
FR775432A (en) | 1934-12-28 |
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