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LM1815

National Semiconductor
Part Number LM1815
Manufacturer National Semiconductor
Description Adaptive Variable Reluctance Sensor Amplifier
Published Oct 17, 2016
Detailed Description LM1815 Adaptive Variable Reluctance Sensor Amplifier June 2001 LM1815 Adaptive Variable Reluctance Sensor Amplifier ...
Datasheet PDF File LM1815 PDF File

LM1815
LM1815

Overview
LM1815 Adaptive Variable Reluctance Sensor Amplifier June 2001 LM1815 Adaptive Variable Reluctance Sensor Amplifier General Description The LM1815 is an adaptive sense amplifier and default gating circuit for motor control applications.
The sense amplifier provides a one-shot pulse output whose leading edge coincides with the negative-going zero crossing of a ground referenced input signal such as from a variable reluctance magnetic pick-up coil.
In normal operation, this timing reference signal is processed (delayed) externally and returned to the LM1815.
A Logic input is then able to select either the timing reference or the processed signal for transmission to the output driver stage.
The adaptive sense amplifier operates with a positive-going threshold which is derived by peak detecting the incoming signal and dividing this down.
Thus the input hysteresis varies with input signal amplitude.
This enables the circuit to sense in situations where the high speed noise is greater th...


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