US 2012/0068869 A1Published application

Compact digital-to-analog converter

AssigneePower Integrations, Inc.

InventorYury Gaknoki

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Abstract

An example digital-to-analog converter includes a reference scaling circuit receiving a first reference current and generating a second reference current. A first plurality of current sources is coupled to a summing node with a current of a first one of the first plurality of current sources proportional to the first reference current. A current of a second one of the first plurality of current sources is substantially equal to twice the current of the first one of the first plurality of current sources. A second plurality of current sources is coupled to the summing node. A current of a first one of the second plurality of current sources is proportional to the second reference current. A current of a second one of the second plurality of current sources is substantially equal to twice the current of the first one of the second plurality of current sources.

Claims10

Dependent claims

A digital-to-analog converter, comprising:

a reference scaling circuit coupled to receive a first reference current, the reference scaling circuit coupled to generate a second reference current in response to the first reference current;
a first plurality of current sources coupled to a summing node, wherein a current of a first one of the first plurality of current sources is proportional to the first reference current, wherein a current of a second one of the first plurality of current sources is substantially equal to twice the current of the first one of the first plurality of current sources;
and
a second plurality of current sources coupled to the summing node, wherein a current of a first one of the second plurality of current sources is proportional to the second reference current, wherein a current of a second one of the second plurality of current sources is substantially equal to twice the current of the first one of the second plurality of current sources.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 13/310,449Filed 2 Dec 2011
Priority: 26 Jan 2010
Published: 22 Mar 2012
Term ends: Not estimatedThe source records don’t support an estimate.

Classification3 codes

H03M 1/68
Digital/analogue converters: with conversions of different sensitivity, i.e. one conversion relating to the more significant digital bits and…
H03M 1/745
Using current sources as quantisation value generators: with weighted currents
H03M
Coding

Family

Application12/693,991Continuation · filed 26 Jan 2010
Application13/310,449Continuation
US 2011/0181453 A1Published application
US 8,094,055 B2Related patent
US 8,830,102 B2Related patent
US 2012/0068869 A1This patent

From the US filing history. Foreign family members aren’t listed.