US 12,130,157 B2
Offset cancel systems and methods for resolver-type sensors
Kazumasa Takai, Kakamigahara (JP)
Assigned to SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC, Scottsdale, AZ (US)
Filed by SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC, Phoenix, AZ (US)
Filed on Jun. 1, 2022, as Appl. No. 17/804,944.
Application 17/804,944 is a continuation of application No. 17/177,346, filed on Feb. 17, 2021, granted, now 11,353,337.
Claims priority of provisional application 63/109,181, filed on Nov. 3, 2020.
Prior Publication US 2022/0291019 A1, Sep. 15, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G01D 5/16 (2006.01)
CPC G01D 5/16 (2013.01) 13 Claims
OG exemplary drawing
 
1. A resolver sensor system comprising:
a signal amplifier portion comprising two or more amplifiers, the signal amplifier portion configured to be coupled to a resolver sensor, the resolver sensor configured to be coupled with a movable element, the signal amplifier portion configured to receive a sine signal and a cosine signal from the resolver sensor; and
a sensor offset canceling portion coupled with the signal amplifier portion, the sensor offset canceling portion comprising:
a first noise reduction filter coupled to a first zero cross detector coupled with a first two AND gates, a first two multiplexers, a first two latches, and a first averaging module; and
a second noise reduction filter coupled to a second zero cross detector coupled with a second two AND gates, a second two multiplexers, a second two latches, and a second averaging module;
wherein the sensor offset canceling portion is configured to generate an offset correction signal to the signal amplifier portion; and
wherein the signal amplifier portion is configured to receive the sine signal and the cosine signal and to generate, using the offset correction signal, an adjusted analog sine signal corresponding to the sine signal and an adjusted analog cosine signal corresponding to the cosine signal.