Patent ID: 6778116
Filing Date: 2004-08-17
Classification: H03M

Abstract:
A digital-to-analog converter (DAC) for converting a digital signal to a representative analog signal, said converter comprising:a first switch responsive to the digital signal; a delay device responsive to the digital signal, said delay device delaying the digital signal a predetermined period of time; a second switch responsive to the delayed digital signal from the delay device; a single current source for generating a current signal; and a third switch responsive to the current signal from the current source and a clock signal, said clock signal having clock cycles defined by a positive portion and a negative portion, wherein the third switch directs the current signal from the current source to the first switch during the positive portions of the clock cycle and directs the current signal from the current source to the second switch during the negative portions of the clock cycle, and wherein the first switch directs the current signal to a first output of the DAC when the digital signal is transmitting a one bit, the second switch directs the current signal to the first output of the DAC when the digital signal is transmitting the one bit, the first switch directs the current signal to a second output of the DAC when the digital signal is transmitting a zero bit, and the second switch directs the current signal to the second output of the DAC when the digital signal is transmitting the zero bit.