Abstract: A pulse count accumulator includes a plurality of counters and a communication port. The plurality of counters are each coupled to a different one of a plurality of actuators and a value of each of the counters corresponds to a position of a corresponding one of the plurality of actuators. The communication port is in communication with the plurality of counters and provides the value of each of the plurality of counters to an external device through the communication port.

Abstract: A pulse count accumulator includes a plurality of counters and a communication port. The plurality of counters are each coupled to a different one of a plurality of actuators and a value of each of the counters corresponds to a position of a corresponding one of the plurality of actuators. The communication port is in communication with the plurality of counters and provides the value of each of the plurality of counters to an external device through the communication port.

Abstract: Circuitry (100, 100') for determining actuator position includes four MOS transistors (T1-T4) connected to each side of a bi-directional motor (10). The current flowing through the motor (10) at any given time is proportional to voltages developed across the internal impedances of the transistors (T1-T4). The resulting motor voltages are amplified and high-pass filtered to remove any DC offsets due to the signal amplification. The conditioned motor voltages are then compared to one or more threshold voltages and passed through a one shot circuit (120) to provide detectable pulses for each motor commutation event. Circuitry (106,107) is provided for counting pulses provided by the one shot circuit (120) and, based on a desired motor position, for providing a number of digital control signals to a digital control circuit (104).