Sigma delta analog to digital converter
First Claim
1. A sigma delta analog to digital converter for converting an analog input into a digital output,wherein the sigma delta analog to digital converter comprises a reference path for receiving a reference voltage,wherein the reference path comprises a digital to analog converter,wherein the digital to analog converter comprises a reference voltage input for receiving the reference voltage,wherein the reference voltage input comprises two contacts,wherein each contact is a beginning of a voltage line of two voltage lines,wherein the digital to analog converter comprises a plurality of switches and a plurality of capacitors,wherein the switches of the plurality of switches are configured to connect the digital to analog converter in a sampling phase with the reference voltage input and to disconnect the digital to analog converter in an integrating phase from the reference voltage input,wherein the switches of the plurality of switches are configured to connect the capacitors of the plurality of capacitors with each other so that the connected capacitors have a total sampling capacity in the sampling phase and a total integrating capacity in the integrating phase, andwherein the total sampling capacity differs from the total integrating capacity.
1 Assignment
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Accused Products
Abstract
A sigma delta analog to digital converter for converting an analog input into a digital output comprises a reference path for receiving a reference voltage. The reference path comprises a digital to analog converter. The digital to analog converter comprises a reference voltage input for receiving the reference voltage, wherein the reference voltage input comprises two contacts and wherein each contact is a beginning of a voltage line of two voltage lines. The digital to analog converter comprises a plurality of switches and a plurality of capacitors. The switches of the plurality of switches are configured to connect the digital to analog converter in a sampling phase with the reference voltage and to disconnect the digital to analog converter in an integrating phase from the reference voltage.
7 Citations
11 Claims
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1. A sigma delta analog to digital converter for converting an analog input into a digital output,
wherein the sigma delta analog to digital converter comprises a reference path for receiving a reference voltage, wherein the reference path comprises a digital to analog converter, wherein the digital to analog converter comprises a reference voltage input for receiving the reference voltage, wherein the reference voltage input comprises two contacts, wherein each contact is a beginning of a voltage line of two voltage lines, wherein the digital to analog converter comprises a plurality of switches and a plurality of capacitors, wherein the switches of the plurality of switches are configured to connect the digital to analog converter in a sampling phase with the reference voltage input and to disconnect the digital to analog converter in an integrating phase from the reference voltage input, wherein the switches of the plurality of switches are configured to connect the capacitors of the plurality of capacitors with each other so that the connected capacitors have a total sampling capacity in the sampling phase and a total integrating capacity in the integrating phase, and wherein the total sampling capacity differs from the total integrating capacity.
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10. A sigma delta analog to digital converter for converting an analog input into a digital output, the sigma delta analog to digital converter comprising:
a digital to analog converter that comprises a plurality of switches, a plurality of capacitors, and a reference voltage input for receiving a reference voltage, wherein switches of the plurality of switches are configured to; connect the digital to analog converter in a sampling phase with the reference voltage input and disconnect the digital to analog converter in an integrating phase from the reference voltage input; and connect capacitors of the plurality of capacitors with each other so that the connected capacitors have a total sampling capacity in the sampling phase and a total integrating capacity in the integrating phase, wherein the total sampling capacity differs from the total integrating capacity.
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11. A sigma delta analog to digital converter for converting an analog input into a digital output, the sigma delta analog to digital converter comprising:
a digital to analog converter that comprises a plurality of switches, a plurality of capacitors, and a reference voltage input for receiving a reference voltage, wherein switches of the plurality of switches are configured to; connect the digital to analog converter in a sampling phase with the reference voltage input and disconnect the digital to analog converter in an integrating phase from the reference voltage input; and connect capacitors of the plurality of capacitors with each other so that the connected capacitors have a total sampling capacity in the sampling phase and a total integrating capacity in the integrating phase, wherein the total sampling capacity equals the total integrating capacity.
Specification