Data converter system with improved power supply accuracy and sequencing
AssigneeAnalog Devices International Unlimited Company
InventorsRichard James Reay, Richard T Owen, Eric C. Welde
Life of this patent
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Abstract
Techniques for improving a power supply accuracy of a precision data converter system, such as analog-to-digital converter circuits (ADCs) and digital-to-analog converter circuits (DACs). Improving the power supply accuracy can enable a reference voltage to be as large as possible, thereby increasing the signal-to-noise-ratio (SNR). The techniques can also simplify power supply sequencing requirements for the data converter system.
Claims13
A data converter system comprising:
- a voltage regulator circuit configured to output a regulated output voltage, wherein the voltage regulator circuit includes a buffer circuit having an input coupled to a first terminal of a set resistor, and wherein a second terminal of the set resistor is coupled to a reference voltage other than ground potential;
- and
- a data converter circuit coupled to an output of the voltage regulator circuit, wherein the data converter circuit includes a buffer circuit, and wherein the output of the voltage re ulator circuit is coupled to the buffer circuit of the ADC circuit, and
- wherein the buffer circuit of the data converter circuit is configured to receive the reference voltage.
A method of operating a data converter system, the method comprising:
- referencing a voltage regulator circuit having a buffer circuit to a reference voltage other than ground potential, including:
- coupling an input of the buffer circuit to a first terminal of a set resistor;
- and
- coupling a second terminal of the set resistor to the reference voltage other than ground potential;
- and
- generating, by the voltage regulator circuit, a regulated output voltage using the reference voltage;
- coupling an output of the voltage regulator circuit to a buffer circuit of a data converter circuit;
- and
- coupling the buffer circuit of the data converter circuit to the reference voltage.
A data converter system with improved power supply accuracy, the data converter system comprising:
- a voltage regulator circuit configured to output a regulated output voltage, wherein the voltage regulator circuit includes a buffer circuit having an input coupled to a first terminal of a set resistor, and wherein a second terminal of the set resistor is coupled to a reference voltage other than ground potential;
- and
- a data converter circuit coupled to an output of the voltage regulator circuit, wherein the data converter circuit includes a buffer circuit, and wherein the output of the voltage regulator circuit is coupled to the buffer circuit of the data converter circuit.
Dependencies are inferred from the claim text.