Digital-to-analog converter with linear amplification rate
AssigneeHynix Semiconductor Inc.
InventorChang-Min Bae
Life of this patent
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Abstract
Digital-to-analog converters are disclosed that include a complementary metal-oxide semiconductor (CMOS) image sensor, which can control the brightness of a stored image delicately. The digital-to-analog converter includes: an array of resistors with weights on their resistance value, to distribute a voltage delicately and develop a plurality of analog signals; a switching circuit to select and output one of the analog signals of the arrayed resistors in response to a digital control code; and an output circuit to buffer and develop the output of the switching circuit.
Claims8
A digital-to-analog converter, comprising:
- an array of resistors with weights on their resistance value, to distribute a voltage delicately and develop a plurality of analog signals;
- a switching circuit to select and output one of the analog signals of the arrayed resistors in response to a digital control code;
- and
- an output circuit to buffer and develop an output from the switching circuit.
A CMOS image sensor, comprising:
- a ramp signal control block to develop a ramp signal that decreases as much as a unit voltage regularly per clock cycle;
- and
- a digital-to-analog converter that outputs a reference voltage to determine the size of the unit voltage,
- wherein the digital-to-analog converter comprises:
- a) an array of resistors with weights on their resistance value, to distribute a voltage delicately and develop a plurality of analog signals;
- b) a switching circuit to select and output one of the analog signals of the arrayed resistors in response to a digital control code;
- and
- c) an output circuit to buffer and develop an output from the switching circuit.
Dependencies are inferred from the claim text.