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US 9,754,550 B1Granted
Current mode DVR or PVCOM with integrated impedances
AssigneeIML International
InventorsAlberto Giovanni Viviani, ChinFa Kao, Chiayao S. Tung
Life of this patent
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Abstract
One or more resistors or resistances are integrated in a 7-bit DVR or PVCOM integrated circuit. A 7-bit DVR or PVCOM integrated circuit includes a 7-bit DAC. The integrated resistors or resistances (R1, R2, or RSET, or any combination) reduces the number of external components, reduces the number of pins, and increases the accuracy of the DVR or PVCOM circuit. The least significant bit (LSB) of the DAC depends only on ratios of internal resistors, which can be made very accurate and independent of temperature.
Claims21
A method comprising:
- providing a digital-to-analog (DAC) converter circuit;
- providing a first operational amplifier circuit;
- coupling a first input of the first operational amplifier circuit to the digital-to-analog converter circuit;
- providing a second operational amplifier circuit;
- coupling a first input of the second operational amplifier circuit to an output of the second operational amplifier circuit and a voltage output;
- and
- coupling a first internal impedance between a first supply voltage and a voltage bias node.
4 more elements
A method comprising:
- providing a digital-to-analog converter circuit;
- providing a first operational amplifier circuit;
- coupling a first input of the first operational amplifier to the digital-to-analog converter circuit;
- providing a second operational amplifier circuit;
- and
- coupling a first input of the second operational amplifier to an output of the second operational amplifier circuit and a voltage output.
3 more elements
Dependencies are inferred from the claim text.