Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1974-03-11
1976-05-04
Miller, Jr., Stanley D.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307203, 307254, 307300, H03K 1700
Patent
active
039550990
ABSTRACT:
Diodes having a fast response time are used in an Emitter-Coupled Logic (ECL) current switch circuit to cause the injection of an idle current in each of the transistors of said switch. The injection of the idle current through these transistors causes them to operate at all times in an active region. When the transistors remain in the active operating region and are subjected to a switching transient, the parasitic capacitance associated with emitter base and collector base junctions are not charged and discharged to the same extent that they would be if the transistor was turned off completely. Moreover, if the transistors are held on, delay required for minority profile "buildup" in the base region is reduced and the current switch's propagation delay is reduced. When the fast response diodes are used to cause the injection of idle current in a cascode circuit, the overall transient response is greatly improved in both the lower and upper current switch sections; and there is a reduction of spurious output signals. Schottky diodes can be used in said circuit due to their fast response time. Alternatively large value resistors or current source transistors are used when diodes are not used.
REFERENCES:
patent: 2757286 (1956-07-01), Wanlass
patent: 3197657 (1965-07-01), Clarke
patent: 3541464 (1970-11-01), Slemmer
patent: 3643230 (1972-02-01), Lynes
Hot Carrier Diodes Switch in Picoseconds by Krakauer et al., Electronics, 7/1963, pp. 53-55.
Devendorf Don C.
Gaskill, Jr. James R.
Davis B. P.
Hughes Aircraft Company
Konzem F. I.
MacAllister W. H.
Miller, Jr. Stanley D.
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