Patent ID: 6384596
Filing Date: 2002-05-07
Classification: G01D

Abstract:
A Transducer, comprised essentially of:a. a variable inductance having a first variable inductance terminal and a second variable inductance terminal; b. a comparison circuit, having a first supply terminal connected to a first supply rail, and having an output terminal connected to said first variable inductance terminal; c. a hysteresis circuit, having a first hysteresis terminal connected to said output terminal of said comparison circuit; d. a charge integrator circuit, having a first charge integrator terminal connected to said second variable inductance terminal, and said first charge integrator terminal is also connected to a first input of the comparison circuit; e. a second charge integrator terminal is connected to a second supply rail and a second hysteresis terminal is connected to a voltage referenced to said supply rails, and said second hysteresis terminal is also connected to a second input of said comparison circuit; and f. a current sensing means, producing a transducer output, and having a first sensing means terminal connected to a second supply terminal of the comparison circuit, and a second sensing means terminal connected to the second supply rail.