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John Peterson

Venable Hall, CB 3290, University of North Carolina, Chapel Hill, NC (since retired)

Bidirectional H-Bridge DC-Motor Motion Controller: Backstory

By John Peterson, October 02, 2008

IN APPLICATIONS REQUIRING ABSOLUTE accuracy in the speed control of dc servo motors, there’s no substitute for the traditional tachometerbased feedback loop. But for somewhat less demanding situations, adequate accuracy often can be achieve
Bidirectional H-Bridge DC-Motor Motion Controller

By John Peterson, July 26, 1999

Combining armature resistance cancellation (via positive current feedback) with a motion-reversing H-bridge circuit topology offers a new twist in dc servo motor speed control.
RMS Converter Has Excellent CMR

By W. Stephen Woodward, May 30, 1994

Designs for rms converters are common, particularly the single-chip monolithic solutions. This circuit (see the figure), however, differs from the others because of its versatile instrumentation-amplifier-type differential inputs that feature