Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1981-10-30
1984-02-07
Anagnos, Larry N.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307452, 307246, 307304, H03K 19017, H03K 19094, H03K 1909
Patent
active
044305834
ABSTRACT:
In an IGFET circuit having a long string of more than two transistors connected in series between an output terminal and a power supply terminal where the load capacitance across the output terminal is on the same order of magnitude as the parasitic capacitances at the junctures of the transistors in the string, the switching-delay is not significantly reduced by uniformly increasing the conduction channel widths of the transistors in the string. However, according to the present invention, a substantial reduction in the switching delay of such a circuit may be obtained by scaling the conduction channel widths of the transistors in the string so as to provide a positive gradient in conduction channel widths along the string in the direction from the output terminal to the power supply terminal. It is particularly advantageous to use exponential scaling of the conduction channel widths. The present invention is also applicable to transistor strings which include one or more groups of parallel connected transistors.
REFERENCES:
patent: 3378783 (1968-04-01), Gibson
patent: 3551693 (1970-12-01), Burns et al.
patent: 3573487 (1971-09-01), Polkinghorn
patent: 3601627 (1971-08-01), Booher
patent: 3651342 (1972-03-01), Dingwall
patent: 3652906 (1972-03-01), Christensen
patent: 3982138 (1976-09-01), Luisi et al.
patent: 4345170 (1982-08-01), Sampson
patent: 4389582 (1983-06-01), Suzuki et al.
Anagnos Larry N.
Bell Telephone Laboratories Incorporated
Torsiglieri Arthur J.
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