Apparatus and methods for a static mux-based priority encoder

Details Apparatus and methods for a static mux-based priority encoder Apparatus and methods for a static mux-based priority encoder

2008-01-29

2008-01-29

Knoll, Clifford (Department: 2111)

Electrical computers and digital processing systems: memory

Storage accessing and control

Specific memory composition

C711S220000, C365S049130

Reexamination Certificate

active

11192580

ABSTRACT:
Apparatus and methods for an improved priority encoder using only static circuit components. Features and aspects hereof rely exclusively on static logic circuits exclusive ROM and other memory structures as relied on in prior structures. The exemplary static circuit structures relied upon in accordance with features and aspects hereof are less susceptible to leakage current and other issues common in high density integrated circuit applications. Thus, features and aspects hereof avoid use of ROM and other similar memory devices in favor of digital encoders comprised of static logic circuits cascaded through multiplexers to provide priority encoding in digital circuit applications coupling multiple devices to a shared, common bus structure.

REFERENCES:
patent: 4586036 (1986-04-01), Thomason et al.
patent: 4875180 (1989-10-01), Kregness et al.
patent: 7043601 (2006-05-01), McKenzie et al.
Philips Semiconductor, “74F148 8-input priority encoder”, Data Sheet, 1990,10 pp. (http://www.standardics.nxp.com/products/fast/pdf/74f148.pdf, last accessed Mar. 19, 2007).
Nave, Carl, “NAND gate”, Georgia State University, 2001, 4 pp.

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