US 8,149,151 B2 · Second order dynamic element rotation scheme

Abstract

A sensor system for generating sample analog signals for processing by a signal processing circuit that utilizes non-constant weights includes a plurality of signal generating elements and a switching network having a plurality of switches operably coupled to the plurality of signal generating elements. The switching network is configured to switch the plurality of signal generating elements between a plurality of different configurations. The system includes a dynamic element matching (DEM) control system for controlling the switch network to implement a second order DEM rotation scheme in which the plurality of signal generating elements are switched to each configuration in the plurality of configurations in a first sequence and then switched to each configuration in the plurality in a second sequence, the second sequence being the reverse of the first sequence.

Claims18

Dependent claims

A sensor system for generating analog signals for processing by a signal processing circuit that utilizes non-constant weights, the sensor system comprising:

a plurality of signal generating elements;
a switching network operably coupled to the plurality of signal generating elements for switching the plurality of signal generating elements between a number M of different configurations;
and
a dynamic element matching (DEM) control system for controlling the switch network to implement a second order DEM rotation scheme in which the plurality of signal generating elements are switched to each of the M configurations in a first sequence and then switched to each of the M configurations in a second sequence, the second sequence being the reverse of the first sequence.

1 more element

A method of operating a sensor system to generate sample analog signals for processing by a signal processing circuit that utilizes non-constant weights, the sensor system including a plurality of signal generating elements for implementing a sensor assembly, the plurality of signal generating elements being operably coupled for switching between a plurality of possible combinations for implementing the sensor assembly, the method comprising:

switching the plurality of signal generating elements to each of the possible configurations in a first sequence, and activating the plurality of signal generating elements to output a sample analog signal for each configuration in the first sequence;
and
after the first sequence, switching the plurality of signal generating elements to each of the possible configurations in a second sequence, the second sequence being the reverse of the first sequence, and activating the plurality of signal generating elements to output a sample analog signal for each configuration in the second sequence.

A signal generating and processing system comprising:

a sensor system including:
a plurality of signal generating elements;
a switching network for switching the plurality of signal generating elements between a plurality of different configurations;
and
a dynamic element matching (DEM) control system for controlling the switch network to implement a second order DEM rotation scheme in which the plurality of signal generating elements are switched to each configuration in the plurality of configurations in a first sequence and then switched to each configuration in a second sequence, the second sequence being the reverse of the first sequence, and wherein the plurality of signal generating elements are activated in each configuration to output a sample analog signal;
and
a signal processing circuit for receiving the sample analog signals, the signal processing circuit being configured to combine the sample analog signals received during the second order DEM rotation scheme in accordance with a noise shaping function to generate a discrete output value, the noise shaping function allocating non-constant weights to each of the sample analog signals at which the sample analog signals contribute to the generation of the discrete output value.

4 more elements

Dependencies are inferred from the claim text.

Second order dynamic element rotation scheme

Life of this patent

Second order dynamic element rotation scheme

Life of this patent

Abstract

Claims18