Family of current/power-efficient high voltage linear regulator circuit architectures
First Claim
Patent Images
1. A voltage regulator circuit, comprising:
- a plurality of circuit stages, each stage generating a voltage output, wherein the output voltage of at least one of the circuit stages is generated based on a received bias current; and
a bias current generator configured to generate the bias current received by the one circuit stage, the bias current generator comprising;
a fixed current source; and
a variable current source, configured to, independent of any of the other circuit stages, source an amount of current dependent on the voltage output of the one circuit stage.
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Abstract
Power efficient power supply regulator circuits are disclosed. The circuits are configured to modify their overhead current according to current load. This is particularly advantageous for use in display devices with widely varying current loads. Such displays include bi-stable displays, such as interferometric modulation displays, LCD displays, and DMD displays.
33 Citations
22 Claims
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1. A voltage regulator circuit, comprising:
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a plurality of circuit stages, each stage generating a voltage output, wherein the output voltage of at least one of the circuit stages is generated based on a received bias current; and a bias current generator configured to generate the bias current received by the one circuit stage, the bias current generator comprising; a fixed current source; and a variable current source, configured to, independent of any of the other circuit stages, source an amount of current dependent on the voltage output of the one circuit stage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of generating an output current at a regulated output voltage, the method comprising:
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generating a voltage output at each of a plurality of circuit stages, wherein the output voltage of at least one of the circuit stages is generated based on a received bias current; and generating the bias current received by the one circuit stage, wherein generating the bias current comprises; generating a fixed current; and independent of any of the other circuit stages, generating a variable current dependent on the voltage output of the one circuit stage. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A display comprising:
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a plurality of bi-stable display elements; and a voltage regulator circuit configured to supply current for driving the display elements, the voltage regulator circuit comprising; a plurality of circuit stages, each stage generating a voltage output, wherein the output voltage of at least one of the circuit stages is generated based on a received bias current; and a bias current generator configured to generate the bias current received by the on circuit stage, the bias current generator comprising; a fixed current source; and a variable current source, configured to, independent of any of the other circuit stages, source an amount of current dependent on the voltage output of the one circuit stage. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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Specification