Electrically adjustable resistor

Details Electrically adjustable resistor Electrically adjustable resistor

2011-08-30

2011-08-30

Lee, Kyung (Department: 2833)

Electrical resistors

Mechanically variable

Resistance value varied by removing or adding material

C257S538000, C257S384000, C438S382000, C438S530000

Reexamination Certificate

active

08009011

ABSTRACT:
An electrically adjustable resistor comprises a resistive polysilicon layer dielectrically isolated from one or more doped semiconducting layers. A tunable voltage is applied to the doped semiconducting layers, causing the resistance of the polysilicon layer to vary. Multiple matched electrically adjustable resistors may be fabricated on a single substrate, tuned by a single, shared doped semiconductor layer, creating matched, tunable resistor pairs that are particularly useful for differential amplifier applications. Multiple, independently adjustable resistors may also be fabricated on a common substrate.

REFERENCES:
patent: 5837592 (1998-11-01), Chang et al.
patent: 6087677 (2000-07-01), Wu
patent: 7199016 (2007-04-01), Heston et al.
patent: 2006/0054975 (2006-03-01), Chen et al.

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