Apparatuses and methods for providing reference voltages

An apparatus comprising:

• a first circuit including a first terminal, a second terminal, and two or more resistors coupled in series between the first and second terminals to provide one or more serial coupling nodes of the two or more resistors, the first circuit further including first and second output terminals that are coupled respectively to selected two of the first terminal, the second terminal and the one or more serial coupling nodes;
• a second circuit configured to supply the first terminal with a first voltage responsive, at least in part, to first control information and with a second voltage responsive, at least in part, to second control information;
• and
• a third circuit configured to cause a current flowing through the two or more resistors when the first terminal is supplied with the first voltage equal to a current flowing through the two or more resistors when the first terminal is supplied with the second voltage, wherein the second voltage is different from the first voltage.

A method comprising:

• by first operational amplifier:
• receiving a first selected voltage at a first input of the first operational amplifier;
• and
• providing a first reference voltage at a first output;
• by second operational amplifier:
• receiving a second selected voltage at a first input of the second operational amplifier;
• and
• providing a second reference voltage at a second output;
• and
• providing a plurality of reference voltages, each of the plurality of reference voltages having a respective voltage between a voltage of the first output and a voltage of the second output.