Patent ID: 8836559
Filing Date: 2014-09-16
Classification: H03M,H04B

Abstract:
1. A transmitter, comprising: a digital signal processing unit configured to provide a digital transmission signal; a digital to analog converter (DAC) comprising: an array of cells, wherein a cell comprises at least one capacitor and at least one discharge trigger element operably coupled to the at least one capacitor; wherein the DAC further comprises a decoding circuit configured to, based on the digital transmission signal, selectively trigger one or more of the at least one discharge trigger element to induce one or more respective capacitors to discharge current onto a current summing path coupled to an output terminal of the DAC, wherein a current level of the discharged current at a given time corresponds to a digital data value of the digital transmission signal at a corresponding time; a power amplifier coupled to the output terminal of the DAC; and a string of stacked resistive elements serially coupled between the input terminal of a transformer and the current summing path.