Electronic digital logic circuitry – Interface – Current driving
Patent
1998-06-03
2000-11-28
Tokar, Michael
Electronic digital logic circuitry
Interface
Current driving
326 30, H03K 1716, H03K 19094, H03K 190175
Patent
active
061540609
ABSTRACT:
Briefly, in accordance with one embodiment of the invention, a driver includes: a plurality of transistors and two substantially equal impedances coupled so as to provide a relatively constant source output impedance during switching of a selected subset of transistors of the plurality. The plurality further provides the relatively constant source output impedance at each of two states of the driver output signal. In accordance with anther embodiment, a signaling circuit includes a circuit configuration including the capability to provide high speed, small swing voltage signaling and low speed, rail-to-rail voltage signaling. The circuit configuration is coupled to provide a substantially constant output impedance during high-speed signaling. In accordance with anther embodiment, a method of operating a dual mode circuit providing a substantially constant output impedance in a first operational mode of high speed, limited voltage swing signaling.
REFERENCES:
patent: 5111080 (1992-05-01), Mizukami et al.
patent: 5495186 (1996-02-01), Kanazawa et al.
patent: 5781028 (1998-07-01), Dacuir
patent: 5973512 (1999-10-01), Baker
patent: 5977797 (1999-11-01), Gasparik
Chang Daniel D.
Intel Corporation
Skaist Howard A.
Tokar Michael
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