GB711116A - Improvements in or relating to amplifier circuits - Google Patents
Improvements in or relating to amplifier circuitsInfo
- Publication number
- GB711116A GB711116A GB20704/52A GB2070452A GB711116A GB 711116 A GB711116 A GB 711116A GB 20704/52 A GB20704/52 A GB 20704/52A GB 2070452 A GB2070452 A GB 2070452A GB 711116 A GB711116 A GB 711116A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- inductance
- circuit
- resistor
- cathode
- 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
- H03F1/08—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements
-
- 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
Abstract
711,116. Valve amplifying circuits. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Aug. 18, 1952 [Aug. 21, 1951], No. 20704/52. Class 40 (6) In an amplifier circuit wherein negative feedback is taken from the cathode circuit of the final valve of an amplifier chain and is applied to an earlier valve in the chain, the effect of high-frequency currents flowing through the gridcathode capacitance of the final valve is neutralized by means of a circuit connected between the anode of the preceding valve and earth and comprising an impedance in series with an inductance, the inductance being tightly coupled to a further inductance in the cathode circuit of the final valve. In the circuit shown, a voltage et is taken from the cathode circuit of the valve 2 and is applied as negative feedback to one of the preceding valves. Due to the grid-cathode capacitance of the valve 2 (shown as element 5) the feedback potential developed does not correspond exactly with that developed across the resistor 3 in the anode circuit of the valve. To compensate for this components 8, 9 and 11 are connected in series with an inductance 6, the inductance 6 being coupled to an inductance 7 in the cathode circuit of the valve 2. The inductance 6 comprises more turns than the inductance 7 the turns-ratio n being preferably of the order of 2 to 4. The component 8 is a condenser whose capacity is 1/n times that of the interelectrode capacitance 5, the component 9 is a resistor having n-times the resistance of the resistor 10 in the cathode circuit of the valve 2 and the component 11 is a resistor designed to damp any resonance produced by the stray inductance of the coupled coils 6 and 7.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL305271X | 1951-08-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB711116A true GB711116A (en) | 1954-06-23 |
Family
ID=19783469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB20704/52A Expired GB711116A (en) | 1951-08-21 | 1952-08-18 | Improvements in or relating to amplifier circuits |
Country Status (5)
| Country | Link |
|---|---|
| CH (1) | CH305271A (en) |
| DE (1) | DE933274C (en) |
| FR (1) | FR1061516A (en) |
| GB (1) | GB711116A (en) |
| NL (2) | NL85810C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1136742B (en) * | 1961-03-02 | 1962-09-20 | Felten & Guilleaume Gmbh | Circuit arrangement for the compensation of disturbing impedances in amplifiers with a negative feedback network |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR572915A (en) * | 1925-04-02 | 1924-06-16 | Self-induction electromotive force compensation device | |
| DE684330C (en) * | 1928-10-26 | 1939-11-28 | Rca Corp | High-frequency amplifier with three-electrode tubes, in which a fraction of the anode alternating voltage corresponding to the tube penetration is used to reverse the anode reaction to the input grid of the tube |
| FR752483A (en) * | 1932-03-18 | 1933-09-23 | Siemens Ag | Arrangement to avoid non-linear deformations |
| BE441205A (en) * | 1940-01-31 |
-
0
- NL NL7414485.A patent/NL163474B/en unknown
- NL NL85810D patent/NL85810C/xx active
-
1952
- 1952-08-17 DE DEN5942A patent/DE933274C/en not_active Expired
- 1952-08-18 GB GB20704/52A patent/GB711116A/en not_active Expired
- 1952-08-19 FR FR1061516D patent/FR1061516A/en not_active Expired
- 1952-08-19 CH CH305271D patent/CH305271A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| NL163474B (en) | |
| FR1061516A (en) | 1954-04-13 |
| NL85810C (en) | |
| DE933274C (en) | 1955-09-22 |
| CH305271A (en) | 1955-02-15 |
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