GB773435A - Improvements in or relating to transistor push-pull modulators - Google Patents
Improvements in or relating to transistor push-pull modulatorsInfo
- Publication number
- GB773435A GB773435A GB16168/55A GB1616855A GB773435A GB 773435 A GB773435 A GB 773435A GB 16168/55 A GB16168/55 A GB 16168/55A GB 1616855 A GB1616855 A GB 1616855A GB 773435 A GB773435 A GB 773435A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transistors
- modulation
- collector
- june
- zone
- 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
- H03C1/542—Balanced modulators, e.g. bridge type, ring type or double balanced type comprising semiconductor devices with at least three electrodes
- H03C1/545—Balanced modulators, e.g. bridge type, ring type or double balanced type comprising semiconductor devices with at least three electrodes using bipolar transistors
Landscapes
- Amplitude Modulation (AREA)
- Amplifiers (AREA)
Abstract
773,435. Modulating systems. PHILIPS ELECTRICAL INDUSTRIES, Ltd. June 6, 1955 [June 9, 1954], No. 16168/55. Class 40(5) A push pull modulator comprises two transistors of npn and two of pnp type connected as shown to form effectively two transistors of the four zone type, carrier p being supplied to the emitter electrodes e of amplitude such that collector current output at c reaches saturation and modulation q being applied to the collector electrodes c of the four zone transistors of small amplitude such that the collector carrier frequency currents vary linearly with the modulation. Capacitors 5, 6 or a potentiometer 7 provide adjustment so that bias voltage sources are unnecessary. The transistors 3, 4 may be interchanged provided an input transformer is used. The modulation q may be applied in phase provided a special output transformer is used.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL331710X | 1954-06-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB773435A true GB773435A (en) | 1957-04-24 |
Family
ID=19784395
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB16168/55A Expired GB773435A (en) | 1954-06-09 | 1955-06-06 | Improvements in or relating to transistor push-pull modulators |
Country Status (5)
Country | Link |
---|---|
BE (1) | BE538812A (en) |
CH (1) | CH331710A (en) |
DE (1) | DE1004681B (en) |
FR (1) | FR1125813A (en) |
GB (1) | GB773435A (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2994044A (en) * | 1957-02-05 | 1961-07-25 | Bell Telephone Labor Inc | Dual transistor switch |
US2914684A (en) * | 1957-03-18 | 1959-11-24 | Collins Radio Co | Transistor phase detector |
US3010079A (en) * | 1958-02-19 | 1961-11-21 | Bell Telephone Labor Inc | Transistor bridge modulator |
DE1086300B (en) * | 1958-12-17 | 1960-08-04 | Siemens Ag | Circuit arrangement for frequency division and multiplication |
US3124767A (en) * | 1961-03-02 | 1964-03-10 | Pospischil | |
US3355678A (en) * | 1963-11-27 | 1967-11-28 | Ericsson Telefon Ab L M | Modulator connection with combined current and voltage feed-back |
DE1222120B (en) * | 1964-05-26 | 1966-08-04 | Felten & Guilleaume Gmbh | Circuit combination for carrier frequency terminal equipment with amplifying modulators |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB401795A (en) * | 1932-06-29 | 1933-11-23 | Gen Electric Co Ltd | Improvements in or relating to electric signalling systems |
-
0
- BE BE538812D patent/BE538812A/xx unknown
-
1955
- 1955-06-04 DE DEN10747A patent/DE1004681B/en active Pending
- 1955-06-06 GB GB16168/55A patent/GB773435A/en not_active Expired
- 1955-06-07 CH CH331710D patent/CH331710A/en unknown
- 1955-06-07 FR FR1125813D patent/FR1125813A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
BE538812A (en) | |
DE1004681B (en) | 1957-03-21 |
CH331710A (en) | 1958-07-31 |
FR1125813A (en) | 1956-11-08 |
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