GB602634A - Improvements in or relating to high-frequency amplifying circuits - Google Patents
Improvements in or relating to high-frequency amplifying circuitsInfo
- Publication number
- GB602634A GB602634A GB27203/45A GB2720345A GB602634A GB 602634 A GB602634 A GB 602634A GB 27203/45 A GB27203/45 A GB 27203/45A GB 2720345 A GB2720345 A GB 2720345A GB 602634 A GB602634 A GB 602634A
- Authority
- GB
- United Kingdom
- Prior art keywords
- anode
- screen
- valve
- circuit
- grid
- 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
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 230000003534 oscillatory effect Effects 0.000 abstract 1
- 230000010363 phase shift Effects 0.000 abstract 1
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
- H03F1/08—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements
- H03F1/14—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements by use of neutralising means
- H03F1/16—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements by use of neutralising means in discharge-tube amplifiers
-
- 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
- H03F1/08—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/26—Push-pull amplifiers; Phase-splitters therefor
- H03F3/28—Push-pull amplifiers; Phase-splitters therefor with tubes only
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/22—Automatic control in amplifiers having discharge tubes
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Abstract
602,634. Valve amplifying circuits. PHILIPS LAMPS, Ltd. Oct, 17, 1945, No. 27203. Convention date, June 22, 1940. [Class 40 (v)] In a push-pull high-frequency amplifier, variation in the input capacity during gain control is prevented by inter-connecting the cathodes and providing ohmic impedance in the anode or screen circuit, the voltage across which is applied to the control grid of the opposite valve of the pair. Fig. 1 shows resistances 13, 14 in the screen-grid circuits coupled to the appropriate control grids by condensers 15, 16. In Fig. 3, the resistances 13, 14 are common to the anode and screengrid circuits, but may be in the anode circuit only (Fig. 2, not shown). In Fig. 4 (not shown), the coupling to the control grid may be via the control grid-screen grid electrode capacity ; in this case the current traversing each resistance is equal to the anode current of one valve less the screen current of the other valve. The ohmic resistance may be constituted by part of the output oscillatory circuit as shown in Fig. 6, which shows a circuit corresponding to that of Fig..4. At very high frequencies, resistances 13, 14 may be replaced by impedances to compensate for any phase-shift which may arise.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL602634X | 1940-06-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB602634A true GB602634A (en) | 1948-05-31 |
Family
ID=19787844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB27203/45A Expired GB602634A (en) | 1940-06-22 | 1945-10-17 | Improvements in or relating to high-frequency amplifying circuits |
Country Status (5)
| Country | Link |
|---|---|
| BE (1) | BE441845A (en) |
| DE (1) | DE881379C (en) |
| FR (1) | FR873202A (en) |
| GB (1) | GB602634A (en) |
| NL (1) | NL57646C (en) |
-
0
- BE BE441845D patent/BE441845A/xx unknown
- NL NL57646D patent/NL57646C/xx active
-
1941
- 1941-06-20 DE DEN2319D patent/DE881379C/en not_active Expired
- 1941-06-20 FR FR873202D patent/FR873202A/en not_active Expired
-
1945
- 1945-10-17 GB GB27203/45A patent/GB602634A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE441845A (en) | |
| FR873202A (en) | 1942-07-02 |
| NL57646C (en) | |
| DE881379C (en) | 1953-06-29 |
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