GB291143A - Improvements in or relating to thermionic amplifiers and circuit arrangements therefor - Google Patents
Improvements in or relating to thermionic amplifiers and circuit arrangements thereforInfo
- Publication number
- GB291143A GB291143A GB5173/27A GB517327A GB291143A GB 291143 A GB291143 A GB 291143A GB 5173/27 A GB5173/27 A GB 5173/27A GB 517327 A GB517327 A GB 517327A GB 291143 A GB291143 A GB 291143A
- Authority
- GB
- United Kingdom
- Prior art keywords
- condenser
- choke
- valve
- grid
- filament
- 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
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/4446—IF amplifier circuits specially adapted for B&W TV
-
- 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
- H03F1/42—Modifications of amplifiers to extend the bandwidth
- H03F1/48—Modifications of amplifiers to extend the bandwidth of aperiodic amplifiers
- H03F1/50—Modifications of amplifiers to extend the bandwidth of aperiodic amplifiers with tubes only
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/02—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements with tubes only
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/50—Amplifiers in which input is applied to, or output is derived from, an impedance common to input and output circuits of the amplifying element, e.g. cathode follower
- H03F3/52—Amplifiers in which input is applied to, or output is derived from, an impedance common to input and output circuits of the amplifying element, e.g. cathode follower with tubes only
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Amplifiers (AREA)
Abstract
291,143. Round, H. J. Feb. 23, 1927. Thermionic amplifiers and detectors. - An inductive reactance or choke is inserted between the plate of one valve and the grid of a following valve, in series with the coupling condenser of the resistance-capacity coupling; the object being to keep up the amplification of the higher voice frequencies. Fig. 1 shows a valve 1 coupled to a following valve by the usual plate resistance 5, coupling condenser 7, and grid leak 11. The choke 8 is inserted on one or other side of the condenser 7; and a condenser 13 (which may be shunted by a damping-resistance. 14) is connected across the grid and filament. At the resonance frequency of the choke in combination with the grid-filament capacity, amplification is increased, whilst beyond that frequency there is a comparatively sharp cut off, which may be adjusted to about five or six thousand cycles. The choke also tends to prevent radio frequency currents from passing from a detector into an audio-frequency amplifier. A condenser 15 may be employed to by-pass radio frequency currents between the plate and filament of the valve 1; and the provision of the choke counteracts the tendency for this condenser to reduce amplification of the higher voice frequencies.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1841383X | 1927-02-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB291143A true GB291143A (en) | 1928-05-23 |
Family
ID=26316229
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5173/27A Expired GB291143A (en) | 1927-02-23 | 1927-02-23 | Improvements in or relating to thermionic amplifiers and circuit arrangements therefor |
Country Status (3)
Country | Link |
---|---|
US (1) | US1841383A (en) |
FR (1) | FR650079A (en) |
GB (1) | GB291143A (en) |
-
1927
- 1927-02-23 GB GB5173/27A patent/GB291143A/en not_active Expired
-
1928
- 1928-02-18 US US255218A patent/US1841383A/en not_active Expired - Lifetime
- 1928-02-23 FR FR650079D patent/FR650079A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR650079A (en) | 1929-01-04 |
US1841383A (en) | 1932-01-19 |
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