Memory device and method for calibrating the device and fabricating the device

A method for fabricating a memory device, comprising:

• measuring a linearity of a first pull-up circuit, a second pull-up circuit, a third pull-up circuit, a first pull-down circuit, a second pull-down circuit and a third pull-down circuit to obtain a measurement result, each of the first pull-up circuit, the second pull-up circuit and the third pull-up circuit having a respective resistance value determined based on a respective pull-up code, and each of the first pull-down circuit, the second pull-down circuit and the third pull-down circuit having a respective resistance value determined based on a respective pull-down code;
• determining a calibration method of a transmission driver based on the measurement result, the transmission driver including the first pull-up circuit, the second pull-up circuit, the third pull-up circuit, the first pull-down circuit, the second pull-down circuit and the third pull-down circuit;
• determining the respective pull-up code of each of the first pull-up circuit, the second pull-up circuit and the third pull-up circuit based on the calibration method;
• and
• determining the respective pull-down code of each of the first pull-down circuit, the second pull-down circuit and the third pull-down circuit based on the calibration method.

A memory device comprising:

• a transmission driver configured to output a multi-level signal;
• and
• a memory storing a calibration setting indicator,
• wherein the transmission driver comprises:
• a first pull-up circuit, a second pull-up circuit and a third pull-up circuit, each of the first pull-up circuit, the second pull-up circuit and the third pull-up circuit having a respective resistance value determined based on a respective pull-up code, and
• a first pull-down circuit, a second pull-down circuit and a third pull-down circuit, each of the first pull-down circuit, the second pull-down circuit and the third pull-down circuit having a respective resistance value determined based on a respective pull-down code,
• wherein the calibration setting indicator indicates a method of setting the respective pull-up code and the respective pull-down code.