Patent ID: RE41831

Claim:
A communication circuit comprising: a digital-to-analog converter to receive a digital control signal, and to provide an analog control signal, the digital-to-analog converter comprising N current sources configured in a parallel arrangement, wherein N is at least two, and wherein each of the N current sources includes a respective control input, M delay elements, an mth one of the M delay elements including an input in communication with an m−1th one of the M delay elements, wherein M is equal to N−1, wherein an output of the mth one of the M delay elements controls the control input of an m+1th one of the N current sources, wherein an input of a first one of the M delay elements receives the digital control signal, and wherein the analog control signal comprises the sum of the outputs of the N current sources; and a voltage-to-current converter to provide a transmit signal based on the analog control signal.