Method and device for resistive load compensation

Details Method and device for resistive load compensation Method and device for resistive load compensation

1994-01-12

1996-07-09

Wong, Peter S.

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

323274, 327 74, G05F 1565

Patent

active

055347703

ABSTRACT:
A compensation circuit includes a first comparator (12) that compares a load signal (18) generated from a resistive load (16) to a first reference voltage (V1). A second comparator (14) compares the load signal (18) to a second reference voltage (V2). The range between the reference voltages (V1 and V2) determines compensation adjustments made to the resistive load (16). A counter circuit (20) increments or decrements a thermometer code count sequence (22) according to the comparisons made by the first and second comparators (12 and 14). The thermometer code count sequence (22) controls and adjusts the resistive load (16) in order to place the load signal (18) within the range of the reference voltages (V1 and V2). The counter circuit (20) prevents the count sequence from continuously rolling over whenever the load signal (18) exceeds the range of the reference voltages (V1 and V2) by more than the maximum compensation available.

REFERENCES:
patent: 4498040 (1985-02-01), Tatsushi et al.
patent: 4862056 (1989-08-01), Goto et al.
patent: 5045832 (1991-09-01), Tam
patent: 5208842 (1993-04-01), Atwood et al.

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