American Standard Inc.

American Standard International Inc.

Ali S Ameen

Matthew A Shepeck

Ronald W Okoren

David Marshall Foye

An HVAC (heating, ventilating, and air conditioning) control and method for interpreting a broad range of input voltages generates a series of voltage pulses whose quantity increases with the amplitude of the input voltages. Upon counting the pulses or accumulating them across a capacitor, the control applies an algorithm to determine whether an input voltage should be interpreted as a logic-1 or a logic-0. The control can accept AC input voltages having nominal amplitudes of either 110 or 220-volts. In some embodiments, software-based hysteresis helps filter out electrical noise and distinguish input signals that are marginally between a logic-1 and a logic-0.

HVAC control and method for interpreting broad range of input voltages

A sensor system. The system comprises a binary sensor issuing a signal representative of a first or second condition; sampling circuitry, operatively connected to the binary sensor, for monitoring the number of transitions between the first and second conditions during a sampling period; integration circuitry for accumulating the sampled number of transitions over time; and signal generation circuitry for issuing an analog signal representative of the accumulated transitions.

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La Crosse, WI, United States of America

Ali S Ameen