초록 ▼

A detection scheme processes the output signal from a sensor so as to provide an ultimate output signal that is more noise resistant and that has a transition representative of a threshold crossing in the sensor signal. A key part of the detection scheme utilizes an integrated version of the sensor\

A detection scheme processes the output signal from a sensor so as to provide an ultimate output signal that is more noise resistant and that has a transition representative of a threshold crossing in the sensor signal. A key part of the detection scheme utilizes an integrated version of the sensor\s output signal and compares it to two reference levels. These reference levels are selected to be near the opposite extremes of the amplitude excursions of the integrated sensor signal. Each time the reference levels are exceeded, a binary signal is latched to one of two levels (e.g. high, low), and is further processed to provide the ultimate output signal that is free of multiple, unwanted transitions in the presence of noise.

대표청구항 ▼

In a signal processing system that includes: (a) a detector receiving a sensor input signal for developing a detector output signal indicative of a threshold-crossing in the sensor input signal; and (b) circuitry receiving the sensor input signal for generating an integrated sensor signal that is ca

In a signal processing system that includes: (a) a detector receiving a sensor input signal for developing a detector output signal indicative of a threshold-crossing in the sensor input signal; and (b) circuitry receiving the sensor input signal for generating an integrated sensor signal that is capable of experiencing amplitude excursions between two opposite extremes, a method of processing the integrated sensor signal and the detector output signal to form a binary level output signal, comprising: comparing the integrated sensor signal to a first reference level that is near one of the extreme amplitude excursions of the integrated sensor signal; comparing the integrated sensor signal to a second reference level that is near the other extreme amplitude excursion of the integrated sensor signal; generating an intermediate output signal that is set to a first state when the integrated sensor signal reaches the first reference level while undergoing an amplitude excursion in a first direction; setting the intermediate output signal to a second state when the integrated sensor signal reaches the second reference level while undergoing an amplitude excursion in a second, opposite direction after completing the excursion in the first direction; and logically combining the intermediate output signal with the detector output signal to develop the binary level output signal having a transition representative of the threshold-crossing of the sensor input signal.