DEVICE FOR DETERMINING ROTATION FREQUENCY Russian patent published in 2010 - IPC G01P3/488 

FIELD: physics.

SUBSTANCE: device contains the following: a sensor made from four thin-film magnetoresistors, a permanent magnet, an instrumentation amplifier connected in a screening circuit, two high-pass filters, a resistor, a power supply, two low-pass filters, a capacitor, four resistors, seven feedthrough capacitors, a varistor and a balancing transformer.

EFFECT: increased reliability and accuracy of determining rotation frequency, quality of transmitting a signal to a consumer.

2 cl, 1 dwg