Coded data generation or conversion – Analog to or from digital conversion – Nonlinear
Reexamination Certificate
2005-12-13
2005-12-13
Jeanpierre, Peguy (Department: 2819)
Coded data generation or conversion
Analog to or from digital conversion
Nonlinear
C341S106000, C341S107000
Reexamination Certificate
active
06975256
ABSTRACT:
A circuit is provided for rectifying and amplifying an AC input waveform to optimize the dynamic range of downstream circuitry, such as an analog-to-digital converter. The circuitry includes an inverting amplifier and a non-inverting amplifier. The inverting amplifier includes a selectable resistance network in a feedback loop that permits the gain to be adjusted by appropriate selection of conductive states of solid state switches. The non-inverting amplifier includes a selectable resistance network on an input line. A control circuit, such as a microprocessor, monitors the output of the A/D converter and controls the conductive state of switches in the feedback and input networks to maintain the digital output within a desired portion of the dynamic range of the A/D converter. Several discrete gains may be provided and programmed in accordance with a predetermined selection scheme.
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Bolda Daniel J.
Haensgen Steven T.
Gerasimow Alexander M.
Jeanglaude Jean Bruner
Jeanpierre Peguy
Rockwell Automation Technologies Inc.
Someren Robert A. Van
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