SHAPER OF PULSES FROM SIGNALS OF INDUCTION SENSORS OF ROTATION FREQUENCY Russian patent published in 2012 - IPC H03K5/00 

FIELD: electricity.

SUBSTANCE: shaper of pulses from signals of induction sensors of rotation frequency comprises an inlet filter 1 of lower frequency, a comparator 6, the first DAC 2 as a source of voltage of sensor signal displacement, the second DAC 5 as a source of a reference signal of the comparator 6, DAC 3, DC 4. At the same time outlets of the induction sensor are connected to inlets of the filter 1. The second outlet of the induction sensor is also connected to the outlet of the first DAC 2, the outlet of the filter 1 is connected with the inlet of ADC 3, the first inlet of the comparator 6 and the first outlet of the shunting resistor Rsh. The second inlet of the comparator 6 is connected to the outlet of the second DAC 5. The second outlet of the shunting resistor Rsh is connected with an open drain of a transistor key T, the drain of the transistor key is connected with the common outlet of the comparator 6, ADC 3, DAC 2 and DAC 5. The outlet of the ADC 3, a gate of the transistor key T, inlets of DAC 2 and ADC 5, the comparator 6 are connected to DC 4. The comparator 6, the transistor key T, ADC 3, DAC 2, DAC 5 and DC 4 are inbuilt components of a microcontroller 7.

EFFECT: higher reliability by provision of diagnostics of inlet circuits for availability of a short circuit and a break, higher noise resistance, simplified implementation of a shaper circuit on the basis of a microcontroller.

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