| 主权项 |
1. A magnetic field sensor, comprising:
a plurality of magnetic field sensing elements configured to generate a respective plurality of x-y output signals, wherein each one of the x-y output signals is responsive to a magnetic field in an x-y plane; a sequence switches circuit coupled to receive the plurality of x-y output signals and configured to generate a sequential signal comprised of sequential ones of the plurality of x-y output signals, wherein the sequential signal comprises a time waveform comprising an error component; an angle processing channel coupled to receive the sequential signal, wherein the angle processing channel comprises:
an angle processing channel output node;an electronic filter having an input node and an output node, wherein the electronic filter is configured to generate a filtered signal at the output node of the electronic filter, and wherein the output node of the electronic filter is coupled to the angle processing channel output node; anda summing circuit having first and second input nodes and an output node, wherein the first input node is coupled to receive a signal representative of the sequential signal and the output node is coupled to the input node of the electronic filter, wherein the magnetic field sensor further comprises: an error correction signal generator circuit having an output node, the error correction signal generator circuit for generating an error correction signal at the output node, wherein the output node of the error correction signal generator circuit is coupled to the second input node of the summing circuit, wherein the error correction signal comprises a plurality of states including a high state and a low state, wherein the electronic filter is configured to generate the filtered signal with a corrected error component smaller than the error component of the sequential signal. |
