CONTROL SYSTEMS HAVING AN ANALOG CONTROL UNIT THAT GENERATES...

Details CONTROL SYSTEMS HAVING AN ANALOG CONTROL UNIT THAT GENERATES... CONTROL SYSTEMS HAVING AN ANALOG CONTROL UNIT THAT GENERATES...

2005-02-15

2005-02-15

Tokar, Michael (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

C341S131000, C341S143000, C341S158000

Reexamination Certificate

active

06856268

ABSTRACT:
A control system includes a digital control unit that is configured to generate a digital value responsive to a difference between an output analog value and a reference value. A control signal generating unit is configured to generate a control signal. An analog control unit includes a first circuit that is configured to generate a first analog value responsive to the digital value and a second circuit that is configured to generate a second analog value responsive to the control signal. The second circuit is configured to generate the second analog value at a resolution that is twice that of a resolution of the first circuit with respect to a least significant bit of the digital value. The analog control unit is configured to combine the first and second analog values to generate the output analog value.

REFERENCES:
patent: 5589832 (1996-12-01), Grundvig et al.
patent: 5608399 (1997-03-01), Coleman, Jr.
patent: 5691720 (1997-11-01), Wang et al.
patent: 6404372 (2002-06-01), Heithoff

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