GB428371A - Improvements in or relating to radio receivers or the like - Google Patents
Improvements in or relating to radio receivers or the likeInfo
- Publication number
- GB428371A GB428371A GB3076333A GB3076333A GB428371A GB 428371 A GB428371 A GB 428371A GB 3076333 A GB3076333 A GB 3076333A GB 3076333 A GB3076333 A GB 3076333A GB 428371 A GB428371 A GB 428371A
- Authority
- GB
- United Kingdom
- Prior art keywords
- frequency
- quenching
- grid
- detector
- quenched
- 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
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D11/00—Super-regenerative demodulator circuits
- H03D11/02—Super-regenerative demodulator circuits for amplitude-modulated oscillations
Abstract
428,371. Valve circuits for wireless reception. PUGH, D. W., and BAIRD TELEVISION, Ltd., 58, Victoria Street, London. Nov. 6, 1933, No. 30763. [Class 40 (v)] A short-wave superhet receiver for television, in which the second detector is of the " quenched " or super-regenerative type, is characterized by the feature that the quenching frequency is at or near one of the " zero " or elided frequencies of the scanning system. The incoming signal may be applied to a backcoupled triode detector-oscillator, and the resulting " sum " frequency passed to a quenched triode for demodulation. Or, as shown, the intermediate frequency from the superhet stage is applied to the input circuit of a two-grid detector valve 9, the input grid 10 being back-coupled to the anode in the ordinary way, whilst the second grid 117 is back-coupled to the anode through the coils 12, 13 to produce a quenching frequency. The demodulated signals are passed through a filter 14, 15 (to cut out carrier and quenching frequencies) to a further amplifier, and thence to the scanning device. The quenching frequency is higher than the highest modulation frequency but lower than the intermediate frequency. Specification 393,960 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3076333A GB428371A (en) | 1933-11-06 | 1933-11-06 | Improvements in or relating to radio receivers or the like |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3076333A GB428371A (en) | 1933-11-06 | 1933-11-06 | Improvements in or relating to radio receivers or the like |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB428371A true GB428371A (en) | 1935-05-07 |
Family
ID=10312757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3076333A Expired GB428371A (en) | 1933-11-06 | 1933-11-06 | Improvements in or relating to radio receivers or the like |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB428371A (en) |
-
1933
- 1933-11-06 GB GB3076333A patent/GB428371A/en not_active Expired
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