Abstract: Disclosed are a method and a device for detecting a short circuit between adjacent micro-bumps. The method includes setting outputs of a pull-up driver and a pull-down driver of a data output circuit connected with a micro-bump to be suitable for a test type and determining whether a short circuit is generated.

Abstract: Provided is a memory device configured to perform a calibration operation without having a ZQ pin. The memory device includes a calibration circuit configured to generate a pull-up calibration code and a pull-down calibration code which termination of a data input/output pad for impedance matching in the data input/output pad is controlled. The calibration circuit performs a first calibration operation for trimming first and second reference resistors based on an external resistor to be connected to a pad, and a second calibration operation for generating the pull-up calibration code and the pull-down calibration code based on the trimmed second reference resistor.

Abstract: A self bias buffer circuit includes a buffer and bias controller. The buffer provides a self bias voltage based on a reference voltage and to be driven based on the self bias voltage. The buffer also generates an output signal based on a comparison of an input signal and the reference voltage. The bias controller adjusts the self bias voltage based on the reference voltage.

Abstract: A compensation circuit for use with an input buffer includes an input buffer configured to amplify an input signal and output a compensated signal. A process detector includes a replica of the input buffer. The process detector is configured to output at least one comparison signal indicating a variation in the input buffer. The input buffer controls an output signal based on the at least one comparison signal.

Abstract: A self bias buffer circuit includes a buffer and bias controller. The buffer provides a self bias voltage based on a reference voltage and to be driven based on the self bias voltage. The buffer also generates an output signal based on a comparison of an input signal and the reference voltage. The bias controller adjusts the self bias voltage based on the reference voltage.

Abstract: A compensation circuit for use with an input buffer includes an input buffer configured to amplify an input signal and output a compensated signal. A process detector includes a replica of the input buffer. The process detector is configured to output at least one comparison signal indicating a variation in the input buffer. The input buffer controls an output signal based on the at least one comparison signal.