Methods and apparatuses for supplying current using a digital sequence
First Claim
Patent Images
1. A method of supplying current to an electronic device comprising:
- receiving an input current; and
incrementally changing an output current supplied to the device according to a digital sequence based on the input current.
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Abstract
Methods and apparatuses for supplying current to an electronic device include incrementally changing an output current supplied to the device according to a digital sequence.
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Citations
19 Claims
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1. A method of supplying current to an electronic device comprising:
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receiving an input current; and incrementally changing an output current supplied to the device according to a digital sequence based on the input current. - View Dependent Claims (2, 3, 4, 5)
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6. A method of supplying current to a digital camera comprising:
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outputting a current at a first level in a first mode; and gradually increasing or decreasing the output current from the first current level to a second current level according to a digital sequence, the second current level different from the first current level. - View Dependent Claims (7, 8, 9, 10, 11, 12)
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13. An apparatus for supplying current to an imaging device comprising:
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a control circuit configured to output a digital word; and a plurality of sequence bit transistors, each sequence bit transistor comprising; a gate configured to receive a respective bit of the digital word; an input source/drain region configured to receive an input current from a common current supply; and an output source/drain region configured to output a respective bit output current, wherein the control circuit outputs the digital word in a sequence of steps to output one or more bit output currents to gradually change a total output current from a first mode current level to a second mode current level. - View Dependent Claims (14, 15, 16, 17)
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18. A camera system comprising:
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a lens; a pixel array and readout circuit for capturing image data; a processing circuit configured to output a digital control word; a plurality of sequence bit transistors, each sequence bit transistor comprising; a gate configured to receive a respective bit of the digital control word; an input source/drain region configured to receive an input current from a common current supply; and an output source/drain region configured to output a respective bit output current; and a current output terminal for outputting a supplied current based on the bit output currents from the plurality of sequence bit transistors, wherein the processing circuit outputs the digital control word to progress through a predetermined sequence of digital codes to incrementally adjust the supplied current through the current output terminal. - View Dependent Claims (19)
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Specification