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US 6,639,533 B2Granted
Digital to analog converter having low power consumption
AssigneeSamsung Electronics Co., Ltd.
InventorKyeong-tae Moon
Life of this patent
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Abstract
A digital to analog converter having low power consumption is provided which includes a reference bias voltage generator for generating a predetermined bias voltage, and a conversion current generator having a plurality of current generators for supplying current which correspond to the bias voltage and a plurality of digital signals to an output terminal.
Claims6
A digital to analog converter comprising:
- a reference bias voltage generator for generating a predetermined bias voltage;
- and
- a conversion current generator comprising a plurality of current generators for supplying current to an output terminal when the bias voltage is applied and a plurality of activated digital signals are received;
- wherein the plurality of current generators which received the activated digital signals are activated to supply current to the output terminal, and current generators which receive deactivated digital signals of the plurality of digital signals do not supply current to the output terminal, and
- wherein the plurality of current generators are comprised of NMOS transistors.
2 more elements
A digital to analog converter comprising:
- a bias voltage generator for generating a bias voltage;
- and
- a current generator having a plurality of current sources for providing current to an output node, each of the current sources being connected to the bias voltage generator and to a corresponding digital activation signal for sourcing current when the digital activation signal is active and not sourcing current when the digital activation signal is inactive, wherein the current generator is comprised of NMOS transistors.
Dependencies are inferred from the claim text.