Patent ID: 8570199
Filing Date: 2013-10-29
Classification: H03M,H04B,H04L

Abstract:
1. A circuit, comprising: an integrated circuit including a pin configured to communicate with circuitry external to the integrated circuit; a current output digital-to-analog converter constructed on the integrated circuit, wherein the current output digital-to-analog converter is configured to i) receive a digital signal, ii) convert the digital signal to a first analog output current corresponding to the digital signal, and iii) convert the first analog output current to an analog voltage; a current buffer constructed on the integrated circuit, wherein the current buffer is configured to i) receive the analog voltage and ii) convert the analog voltage to a second analog output current, wherein the second analog output current is coupled to the pin of the integrated circuit, and wherein the pin is configured to i) receive the second analog output current and ii) output the second analog output current from the integrated circuit to the circuitry external to the integrated circuit.