Voltage generator, analog-to-digital converter, and image sensor system
First Claim
Patent Images
1. A voltage generator comprising:
- a ladder resistor circuit for generating a plurality of different reference voltages;
a plurality of switching circuits corresponding to a plurality of taps of the ladder resistor circuit, each of the plurality of switching circuits being connected at one end to a corresponding one of the taps and connected at the other end to an output node, and having a variable on-resistance value; and
a control circuit for selecting continuous n (where n is any integer equal to or greater than
2) of the plurality of switching circuits, turning the n switching circuits on, and setting the respective on-resistance values of the n switching circuits.
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Abstract
A ladder resistor circuit generates a plurality of different reference voltages. A plurality of switching circuits correspond to a plurality of taps of the ladder resistor circuit. Each of the plurality of switching circuits is connected at one end to a corresponding one of the taps and connected at the other end to an output node, and has a variable on-resistance value. A control circuit selects continuous n (where n is any integer equal to or greater than 2) of the plurality of switching circuits, turns the n switching circuits on, and sets the respective on-resistance values of the n switching circuits.
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Citations
12 Claims
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1. A voltage generator comprising:
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a ladder resistor circuit for generating a plurality of different reference voltages; a plurality of switching circuits corresponding to a plurality of taps of the ladder resistor circuit, each of the plurality of switching circuits being connected at one end to a corresponding one of the taps and connected at the other end to an output node, and having a variable on-resistance value; and a control circuit for selecting continuous n (where n is any integer equal to or greater than
2) of the plurality of switching circuits, turning the n switching circuits on, and setting the respective on-resistance values of the n switching circuits. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification