Patent ID: 11933648
Assignee: INVENSENSE, INC.
Field: Basic communication processes (Electrical engineering)
Classification: CPC G  H  B | IPC B  G  H

Claim 0:
1. A sensor output digitizer, comprising:
a multiplexer stage configured to sequentially select sensor outputs from one or more sensors, resulting in a stream of selected sensor outputs;
a multi-stage analog to digital converter coupled with the multiplexer stage and configured to convert the stream of selected sensor outputs into a stream of digitized outputs, wherein the multi-stage analog to digital converter comprises:
a first stage comprising a sigma delta analog to digital converter, wherein the first stage converts the stream of selected sensor outputs into a first intermediate output and a second intermediate output; and
a second stage comprising a second analog to digital converter, wherein the second stage is coupled with the first intermediate output and converts the first intermediate output into a third intermediate output while the first stage continues to convert the stream of selected sensor outputs; and

a digital output combiner configured to re-scale and sum the second intermediate output and the third intermediate output to produce the stream of digitized sensor outputs.