Current mode DVR or PVCOM with integrated impedances

摘要

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.

主权项

1. A device comprising:
an digital-to-analog (DAC) converter circuit formed on a semiconductor substrate of an integrated circuit; a first operational amplifier circuit, formed on the semiconductor substrate, comprising a first input and a second input, wherein the first input is coupled to the digital-to-analog converter circuit; a second operational amplifier circuit, formed on the semiconductor substrate, comprising a first input and a second input, wherein the first input is coupled to an output of the second operational amplifier circuit and a voltage output of the integrated circuit; and a first internal impedance, formed on the semiconductor substrate, coupled between a first supply voltage and a voltage bias node.