GB625532A - Improvements in electrical wave translating systems - Google Patents
Improvements in electrical wave translating systemsInfo
- Publication number
- GB625532A GB625532A GB21773/47A GB2177347A GB625532A GB 625532 A GB625532 A GB 625532A GB 21773/47 A GB21773/47 A GB 21773/47A GB 2177347 A GB2177347 A GB 2177347A GB 625532 A GB625532 A GB 625532A
- Authority
- GB
- United Kingdom
- Prior art keywords
- diagonal
- bridge
- resistance
- rectifier
- balance
- 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
- 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
- H03C1/56—Balanced modulators, e.g. bridge type, ring type or double balanced type comprising variable two-pole elements only
- H03C1/58—Balanced modulators, e.g. bridge type, ring type or double balanced type comprising variable two-pole elements only comprising diodes
Landscapes
- Rectifiers (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
625,532. Modulating systems ; detectors. WESTERN ELECTRIC CO., Inc. Aug. 7, 1947, No. 21773. Convention date, Jan. 23, 1943. [Class 40 (v)] Modulating and de-modulating circuits employing a bridge arrangement of non-linear elements are balanced as regards the capacity of the elements and their reverse resistance in order to effect carrier current suppression, want of capacity balance being redressed by a differential condenser connected across one diagonal of the bridge with its rotor element connected to one end of the other diagonal, and want of reverse-resistance balance by a resistor connected across one diagonal with an adjustable tap connected to one end of the other diagonal. The Figure shows a modulator of the kind described in Specification 538,795, with carrier applied from a source 31 across one diagonal of the rectifier bridge 10, 11, 12, 13, and with signal voltage from a microphone 19 connected across the other diagonal, output being taken across the latter to a load 28. The invention consists in inserting a resistor 50 across one diagonal with a tap 51 connected to either end of the other diagonal ; and in connecting a condenser with its stator plates 54, 56 connected across one diagonal and its adjustable rotor 58 connected to one end of the other diagonal. If the reverse resistance of rectifier 13 is too high to produce a balance, the tap 51 is moved to reduce the shunt resistance across that rectifier, and to increase the resistance across the rectifier 12. Similarly, if the capacities of rectifiers 11, 12 are unequal or are not in a desired ratio, balance may be restored by varying the shunt capacities 54, 58 and 56, 58. The tapped resistor and the differential condenser may be connected across the same or different diagonal of the bridge, and the adjustable tap may be connected to either terminal of the other diagonal. A capacity 29 is connected in series with the vertical diagonal of the bridge to assist in balancing the resistance of the elements for forward flow of current therethrough, as in Specification 538,795. The bridge may be arranged as a demodulator, (Fig. 2, not shown).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US473339A US2373569A (en) | 1943-01-23 | 1943-01-23 | Wave translating system |
Publications (1)
Publication Number | Publication Date |
---|---|
GB625532A true GB625532A (en) | 1949-06-29 |
Family
ID=23879145
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB21773/47A Expired GB625532A (en) | 1943-01-23 | 1947-08-07 | Improvements in electrical wave translating systems |
Country Status (3)
Country | Link |
---|---|
US (1) | US2373569A (en) |
FR (1) | FR947860A (en) |
GB (1) | GB625532A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE934052C (en) * | 1951-08-28 | 1955-10-13 | Gen Electric Co Ltd | Arrangement for modulating electrical carrier vibrations |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2663002A (en) * | 1950-06-20 | 1953-12-15 | Stanolind Oil & Gas Co | Attenuator for seismic gain control |
US2751495A (en) * | 1952-05-07 | 1956-06-19 | W L Maxson Corp | Frequency error sensing means |
US2777057A (en) * | 1952-12-16 | 1957-01-08 | Rca Corp | Radiation powered transistor circuits |
US2797314A (en) * | 1953-03-05 | 1957-06-25 | Bell Telephone Labor Inc | Demodulation of vestigial sideband signals |
US2814780A (en) * | 1953-07-20 | 1957-11-26 | Engineering Lab Inc | Bridge-type modulator mixer |
US2695988A (en) * | 1953-10-30 | 1954-11-30 | Gen Precision Lab Inc | Mixer-modulator |
US3059054A (en) * | 1958-04-28 | 1962-10-16 | Paramount Pictures Corp | Audio nonsense generator |
US3093802A (en) * | 1959-02-25 | 1963-06-11 | Gen Electric | Controllable signal transmission network |
US3332016A (en) * | 1963-11-05 | 1967-07-18 | Viktor J Pokorny | Single sideband transceiver system |
US3328694A (en) * | 1964-10-01 | 1967-06-27 | Collins Radio Co | Bilateral transmit-receive function dual quad diode bridge-oscillator frequency translator circuit |
DE1288067B (en) * | 1965-02-19 | 1969-01-30 | ||
US3443249A (en) * | 1966-11-22 | 1969-05-06 | Bell Telephone Labor Inc | Wave limiter circuit and apparatus |
US4220830A (en) * | 1978-08-04 | 1980-09-02 | Electro-Physical Research, Incorporated | Hearing aid with modulated suppressed carrier signal |
FR2617337B1 (en) * | 1987-06-26 | 1989-07-07 | Thomson Hybrides Microondes | RING MICROWAVE DEVICE |
-
1943
- 1943-01-23 US US473339A patent/US2373569A/en not_active Expired - Lifetime
-
1947
- 1947-06-12 FR FR947860D patent/FR947860A/en not_active Expired
- 1947-08-07 GB GB21773/47A patent/GB625532A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE934052C (en) * | 1951-08-28 | 1955-10-13 | Gen Electric Co Ltd | Arrangement for modulating electrical carrier vibrations |
Also Published As
Publication number | Publication date |
---|---|
FR947860A (en) | 1949-07-15 |
US2373569A (en) | 1945-04-10 |
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