GB468959A - Improvements in or relating to methods of modulating carrier waves - Google Patents
Improvements in or relating to methods of modulating carrier wavesInfo
- Publication number
- GB468959A GB468959A GB1315/36A GB131536A GB468959A GB 468959 A GB468959 A GB 468959A GB 1315/36 A GB1315/36 A GB 1315/36A GB 131536 A GB131536 A GB 131536A GB 468959 A GB468959 A GB 468959A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- modulating
- grid
- signal
- impedance
- 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
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K19/00—Synchronous motors or generators
- H02K19/02—Synchronous motors
- H02K19/10—Synchronous motors for multi-phase current
- H02K19/12—Synchronous motors for multi-phase current characterised by the arrangement of exciting windings, e.g. for self-excitation, compounding or pole-changing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
- B01F27/86—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis co-operating with deflectors or baffles fixed to the receptacle
- B01F27/862—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis co-operating with deflectors or baffles fixed to the receptacle the baffles being adjustable or movable
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03C—MODULATION
- H03C1/00—Amplitude modulation
- H03C1/52—Modulators in which carrier or one sideband is wholly or partially suppressed
- H03C1/54—Balanced modulators, e.g. bridge type, ring type or double balanced type
-
- 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
- H03F1/32—Modifications of amplifiers to reduce non-linear distortion
- H03F1/33—Modifications of amplifiers to reduce non-linear distortion in discharge-tube amplifiers
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Amplitude Modulation (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
468,959. Modulating systems. FERNSEH AKT.-GES. Jan. 15, 1936, No. 1315. Convention date, Jan. 15, 1935. [Class 40 (v)] Modulating frequencies are balanced out in the outgoing circuit of a modulator valve, by applying both modulating signal and carrier wave to the modulating valve, and applying the modulating signal alone to a balancing valve. As shown in the Figure, the carrier is applied to the coil 2 in the grid circuit of the modulating-valve 1, in series with a signal voltage derived from the impedance 5, and a modulated carrier wave is taken off across the plate circuit impedance 7. A signal voltage in phase opposition to that applied to the grid of valve 1 is applied to the grid of an amplifier 8, the plate of which is directly connected to the plate of the valve 1, so as to balance out the signal voltage in the common plate circuit. The impedance 7 may be centre-tapped and connected through capacities to the grids of valves 1, 8 so as to neutralize their inter-electrode capacities, Fig. 2 (not shown) ; or screen-grid valves may be used. Instead of dividing the signal-input impedance 5, the necessary phase relation in the common plate circuit may be produced by using a pair of resistance-coupled valves instead of the single valve 8, Fig. 3 (not shown. The carrier input and the signal input may be applied to separate grids when multi-grid valves are used, Fig. 4 (not shown).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE468959X | 1935-01-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB468959A true GB468959A (en) | 1937-07-15 |
Family
ID=6540948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1315/36A Expired GB468959A (en) | 1935-01-15 | 1936-01-15 | Improvements in or relating to methods of modulating carrier waves |
Country Status (3)
| Country | Link |
|---|---|
| FR (2) | FR468959A (en) |
| GB (1) | GB468959A (en) |
| NL (1) | NL44199C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2441964A (en) * | 1944-05-19 | 1948-05-25 | Standard Telephones Cables Ltd | Compensating circuit |
-
0
- NL NL44199D patent/NL44199C/xx active
-
1914
- 1914-02-26 FR FR468959A patent/FR468959A/en not_active Expired
-
1936
- 1936-01-15 FR FR800734D patent/FR800734A/en not_active Expired
- 1936-01-15 GB GB1315/36A patent/GB468959A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2441964A (en) * | 1944-05-19 | 1948-05-25 | Standard Telephones Cables Ltd | Compensating circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| FR468959A (en) | 1914-07-21 |
| FR800734A (en) | 1936-07-17 |
| NL44199C (en) |
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