GB423772A - Improvements in or relating to thermionic valve arrangements - Google Patents
Improvements in or relating to thermionic valve arrangementsInfo
- Publication number
- GB423772A GB423772A GB12343/34A GB1234334A GB423772A GB 423772 A GB423772 A GB 423772A GB 12343/34 A GB12343/34 A GB 12343/34A GB 1234334 A GB1234334 A GB 1234334A GB 423772 A GB423772 A GB 423772A
- Authority
- GB
- United Kingdom
- Prior art keywords
- grid
- valve
- coil
- oscillation
- anode
- 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
- 230000010355 oscillation Effects 0.000 abstract 4
- 230000002459 sustained effect Effects 0.000 abstract 2
- 230000005540 biological transmission Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 abstract 1
- 238000007689 inspection Methods 0.000 abstract 1
- 230000003472 neutralizing effect Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
- H03D7/06—Transference of modulation from one carrier to another, e.g. frequency-changing by means of discharge tubes having more than two electrodes
- H03D7/10—Transference of modulation from one carrier to another, e.g. frequency-changing by means of discharge tubes having more than two electrodes the signals to be mixed being applied between different pairs of electrodes
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
- H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
- H03B5/10—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being vacuum tube
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mobile Radio Communication Systems (AREA)
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
423,772. Valve circuits for wireless reception ; valve modulating circuits. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., Electra House, Victoria Embankment, London.-(Assignees of Travis, C. ; 354, West Allen's Lane, Philadelphia, U.S.A.) April 24, 1934, No. 12343. Convention date, April 27, 1933. [Class 40 (v)] In an oscillator-modulator of the multi-grid valve type, the oscillation is sustained by energy fed back jointly by an intermediate anode-grid and by the plate of the valve, with the object of maintaining the oscillation at constant frequency and amplitude despite variations in the voltage of an outer grid. As shown in Fig. 4, applied to a superheterodyne wireless receiver, oscillation is sustained in the tuned circuit 12 of the inner grid 1 by two feed-back coils 13, 28, one of which 13 is connected through a voltage-reducing resistance 14 to the anode-grid 2, and the other 28 to the valve plate 6. The incoming wave received at 19 is applied to the grid 4, which is shielded from the other electrodes by screens 3, 5 and volume control bias, automatic or manual, is applied to the grid 4 through the lead 20. When either coil 13 or 28 is used separately, variation of the control bias on the grid 4 alters the frequency and amplitude of the local oscillation, but by suitably proportioning the coils and using them jointly, the effects neutralize each other. A single feed-back coil may be used connected wholly or in part to both anode circuits, Figs. 2 and 3, (not shown). When applied to a transmission modulator, an audio-frequency transformer is used in the input to the grid 4, Fig. 5, (not shown). The Specification as open to inspection under Sect. 91 includes a superheterodyne receiving circuit in which only the coil 13 is used as a ack-coupling to the circuit 12, the plate 6 being connected through a neutralizing condenser to a coil coupled to the signal input circuit 19. This subject-matter does not appear in the Specification as accepted. Reference has been directed by the Comptroller to Specification 408,256.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US668231A US2153778A (en) | 1933-04-27 | 1933-04-27 | Circuit arrangement |
| US162274A US2194512A (en) | 1933-04-27 | 1937-09-03 | Combined oscillator-detector circuits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB423772A true GB423772A (en) | 1935-02-07 |
Family
ID=26858602
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB12343/34A Expired GB423772A (en) | 1933-04-27 | 1934-04-24 | Improvements in or relating to thermionic valve arrangements |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2194512A (en) |
| DE (1) | DE632327C (en) |
| FR (1) | FR771600A (en) |
| GB (1) | GB423772A (en) |
| NL (1) | NL38790C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2774867A (en) * | 1952-06-14 | 1956-12-18 | Hazeltine Research Inc | Frequency modulation detector having fixed output frequency converter |
| DE1035218B (en) * | 1952-09-10 | 1958-07-31 | Telefunken Gmbh | Circuit arrangement for generating a powerful frequency spectrum |
-
0
- NL NL38790D patent/NL38790C/xx active
-
1934
- 1934-04-10 FR FR771600D patent/FR771600A/en not_active Expired
- 1934-04-24 GB GB12343/34A patent/GB423772A/en not_active Expired
- 1934-04-24 DE DER90463D patent/DE632327C/en not_active Expired
-
1937
- 1937-09-03 US US162274A patent/US2194512A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| NL38790C (en) | |
| FR771600A (en) | 1934-10-12 |
| US2194512A (en) | 1940-03-26 |
| DE632327C (en) | 1936-07-06 |
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