Patent ID: 8860469
Filing Date: 2014-10-14
Classification: G11C

Abstract:
1. An integrated circuit comprising: a transmitter buffer circuit comprising a first switch having first and second ends, wherein the first end of the first switch is connected to the first end of the second resistor, and the first switch is closed during the output swing calibration mode and open during the operating mode; a second switch having first and second ends, wherein the first end of the second switch is connected to the second end of the second resistor, and the second switch is closed during the output swing calibration mode and open during an operating mode; calibration logic and control circuitry that provides the fixed data input value to the transmitter buffer circuit and calibrates an output swing of the transmitter buffer circuit during the output swing calibration mode based on a measured voltage difference across the second resistor that is communicated by way of the first and second switches, wherein the output swing of the transmitter buffer circuit is adjusted by at least varying a current of the current source in the transmitter buffer circuit.