Patent ID: 8542769
Filing Date: 2013-09-24
Classification: H03F,H03M,H04B

Abstract:
1. A digital-to-analog upconverter configured to convert a baseband digital value to a radio frequency (RF) analog signal, said digital-to-analog upconverter comprising: a first balanced upconverter configured to convert an In-phase portion of the baseband digital value to a first In-phase analog component (I a second balanced upconverter configured to convert a Quadrature portion of the baseband digital value to a first Quadrature analog component (Q a first amplifier configured to amplify I a second amplifier configured to amplify Q wherein the first and second amplifiers each operate at a 50% duty cycle and in an interleaved fashion such that only one of the first and second amplifiers is active at any time, and such that the first amplifier outputs the amplified I a differential combiner configured to combine the amplified signals output by the first and second amplifiers during the cycle to generate the RF analog signal representative of the baseband digital value.