DIGITAL-TO-ANALOG CONVERTERS HAVING CIRCUIT ARCHITECTURES TO OVERCOME SWITCH LOSS

Title:

DIGITAL-TO-ANALOG CONVERTERS HAVING CIRCUIT ARCHITECTURES TO OVERCOME SWITCH LOSS

Document Type and Number:

Japanese Patent JP2010288247

Kind Code:

A

Abstract:

To provide a digital-to-analog converter (DAC) of which linearity is enhanced rather than a conventional voltage mode DAC and an overall switch area is small and which is insensitive to parasitic electric resistance.

The DAC includes a pair of operational amplifiers, each having a first input coupled to a respective high or a low reference voltage. The DAC includes a plurality of switch-controlled cells, each of which includes a resistor and two force/sense switch pairs. For each cell, all four switches are coupled to the resistor. A first force switch is coupled to the output of a first operational amplifier, and an associated sense switch is coupled to inverting input of the first operational amplifier. A second force switch is coupled to the output of a second operational amplifier, and an associated sense switch is coupled to an inverting input of the second operational amplifier.

Inventors:

MCLACHLAN RODERICK

Application Number:

JP2009194393A

Publication Date:

December 24, 2010

Filing Date:

August 25, 2009

Export Citation:

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