GB197504A - Improvements in telephone repeater circuits - Google Patents
Improvements in telephone repeater circuitsInfo
- Publication number
- GB197504A GB197504A GB1050722A GB1050722A GB197504A GB 197504 A GB197504 A GB 197504A GB 1050722 A GB1050722 A GB 1050722A GB 1050722 A GB1050722 A GB 1050722A GB 197504 A GB197504 A GB 197504A
- Authority
- GB
- United Kingdom
- Prior art keywords
- circuit
- resistance
- parallel
- choke coil
- alternative
- 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
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/01—Frequency selective two-port networks
Abstract
197,504. General Electric Co., Ltd., and Marris, G. C. April 12, 1922. Filter circuits.-A filter circuit for preventing waves of high frequency reaching the input electrode of a telephone repeater valve includes a choke coil 8 with inductance, capacity and resistance in series and parallel so related to the constants of the remainder of the circuit that the ratio of the grid voltage to that of the primary of the input transformer is sensibly constant for frequencies up to a certain value and then decreases rapidly. In the example given, the grid circuit includes the input transformer 4 with resistances 10, 11 which are usually alternative, the choke coil 8 in parallel with a condenser 13 and a resistance 9, which may be alternative or supplementary, and a large resistance 12. A resonant circuit 14 is provided in the output circuit of the valve to give a sharp cut off at the critical frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1050722A GB197504A (en) | 1922-04-12 | 1922-04-12 | Improvements in telephone repeater circuits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1050722A GB197504A (en) | 1922-04-12 | 1922-04-12 | Improvements in telephone repeater circuits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB197504A true GB197504A (en) | 1923-05-17 |
Family
ID=9969095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1050722A Expired GB197504A (en) | 1922-04-12 | 1922-04-12 | Improvements in telephone repeater circuits |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB197504A (en) |
-
1922
- 1922-04-12 GB GB1050722A patent/GB197504A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB197504A (en) | Improvements in telephone repeater circuits | |
| US2204702A (en) | Piezoelectric crystal filter with inductive shunt | |
| GB140449A (en) | Improvements relating to the production of electric oscillations | |
| US2391386A (en) | Harmonic generator | |
| GB668498A (en) | Improvements in or relating to superheterodyne radio-receivers | |
| GB367430A (en) | Improved means for obtaining constant voltage in alternating current circuits | |
| GB625197A (en) | Improvements in or relating to networks for the transmission of electrical oscillations | |
| GB337830A (en) | Electrical amplifier circuits | |
| GB637094A (en) | Improvements in or relating to circuit-arrangements for acting upon the natural frequency of oscillatory circuits | |
| US2401939A (en) | Aperiodic phase inverter | |
| US1775544A (en) | Stabilization of tuned radio frequency amplifiers | |
| US1829419A (en) | Frequency multiplication | |
| US1742251A (en) | Amplifying system | |
| US1763380A (en) | Electric coupling system | |
| GB241167A (en) | Improvements in electrical frequency multiplying systems, more especially for wireless signalling | |
| SU55525A1 (en) | Gain stage | |
| GB190840A (en) | Improvements in intervalve electric transformers or the like | |
| GB257003A (en) | Improvements in or relating to devices for coupling thermionic valve circuits | |
| GB491603A (en) | Improvements in oscillatory circuits comprising negative resistance | |
| US1926125A (en) | Band pass amplifier | |
| GB491903A (en) | Improvements in or relating to circuit arrangements for suppressing undesired frequencies in wireless receiving apparatus | |
| GB265612A (en) | Improvements in or relating to thermionic valve circuits | |
| GB282136A (en) | Improvements in apparatus for filtering electrical currents | |
| GB472687A (en) | Improvements in arrangements for suppressing magnetic saturation phenomena in electric alternating current power circuits | |
| GB583377A (en) | Improved means for coupling an electric oscillator to a load |