Digital to analog converter
AssigneeSK hynix Inc.
InventorsChang Yong AHN, Jun Ho CHEON
Life of this patent
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Abstract
A digital to analog converter includes a reference voltage generation unit that generates a reference voltage, and a plurality of unit conversion units. A number of unit conversion units to be activated are decided in response to digital codes. An activated unit conversion unit drives a control node to a voltage level corresponding to a voltage level of the reference voltage, and a deactivated unit conversion unit substantially maintains the control node to a voltage level greater than a voltage level of a ground voltage.
Claims20
A digital to analog converter comprising:
- a reference voltage generation unit that generates a reference voltage;
- and
- a plurality of unit conversion units, and a number of unit conversion units to be activated being decided in response to digital codes,
- wherein an activated unit conversion unit drives a control node to a voltage level corresponding to a voltage level of the reference voltage, and a deactivated unit conversion unit substantially maintains the control node to a voltage level greater than a voltage level of a ground voltage.
A digital to analog converter comprising:
- a plurality of unit conversion units,
- wherein a number of unit conversion units to be electrically coupled to an output node is decided in response to digital codes, and each of unit conversion units electrically coupled to the output node drives a control node to a voltage level corresponding to a voltage level of the reference voltage and electrically couples the control node to the output node, and each of unit conversion units not electrically coupled to the output node substantially maintains a voltage level of the control node to a voltage level greater than a voltage level of a ground voltage.
A digital to analog converter comprising:
- first to third conversion units configured to be activated in response to digital codes;
- an activated unit conversion unit electrically coupled to an output node and configured to drive a control node to a voltage level corresponding to a voltage level of a reference voltage;
- and
- a deactivated unit conversion unit configured to substantially maintain the control node to a voltage level greater than a ground voltage,
- wherein the deactivated unit conversion unit is configured to substantially maintain the control node to a voltage level between a voltage level of the ground voltage and the voltage level of the control node.
Dependencies are inferred from the claim text.