Variable attenuation circuit for a differential variable relucta

Details Variable attenuation circuit for a differential variable relucta Variable attenuation circuit for a differential variable relucta

1998-05-18

2000-03-21

Patidar, Jay

Electricity: measuring and testing

Electrical speed measuring

Including speed-related frequency generator

324166, 327308, G01P 3488, G01P 3489, H03L 500, G01R 1508

Patent

active

060406925

ABSTRACT:
A variable reluctance sensor interface module having a variable attenuation circuit and a rectifier and differential to single-ended conversion circuit for operating in a current mode to attenuate a differential input voltage. The variable attenuation circuit receives an input differential voltage from a magnetic sensor and converts the differential voltage to current. First and second current sourcing circuits, each including a plurality of current sourcing branches, receive the current and provides variable current attenuation by switching in and out transistor-based current sourcing branches. The rectifier and differential to single-ended conversion circuit converts the variably attenuated currents to a voltage output.

REFERENCES:
patent: 5144233 (1992-09-01), Christenson et al.
patent: 5450008 (1995-09-01), Good et al.
patent: 5510706 (1996-04-01), Good

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