High resolution resistor ladder network with reduced number of r

Details High resolution resistor ladder network with reduced number of r High resolution resistor ladder network with reduced number of r

1992-07-13

1994-03-08

Lateef, Marvin M.

Electrical resistors

Plural resistance elements connected by a jumper or spacer

338260, 338320, H01C 722

Patent

active

052931480

ABSTRACT:
A resistor network is provided which significantly reduces the total number of resistors required to achieve a given resolution. It comprises a cell of resistors that consists of a nonbinary number of resistors that is not evenly divisible by an integer power of two and is specifically selected to permit the group of resistors to be sequentially reduced to subgroups, or combinations, of resistors which yield a plurality of subgroup resistances that differ from preceding or subsequent subgroup resistances by a generally equivalent differential. The cell of resistors is combined with a plurality of resistor cells that consist of binary numbers of resistors in a conventional resistor ladder format. When combined with the binary resistor cells, the cell consisting of a nonbinary number of resistors provides a substantially similar resolution with a significant reduction in the number of resistors required. One embodiment of the present invention permits the resolution of a sixty-two resistor ladder to be simulated by a ladder that comprises only twenty-three resistors.

REFERENCES:
patent: Re29676 (1978-06-01), Hareyama et al.
patent: 4337390 (1982-06-01), Best
patent: 4626804 (1984-12-01), Risher et al.
patent: 4703302 (1987-10-01), Hino et al.
patent: 4782320 (1988-11-01), Shier
patent: 4859980 (1989-08-01), Hammond

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