Patent ID: 8912937
Filing Date: 2014-12-16
Classification: H03F,H03M

Abstract:
1. A power digital-to-analog converter (DAC), comprising: an amplitude mapper configured to receive an input signal and to generate a first input constituent signal and a second input constituent signal from the input signal; a first DAC configured to receive the first input constituent signal and to generate a first current signal; a second DAC configured to receive the second input constituent signal and to generate a second current signal; and a combiner configured to combine the first and second current signals to generate an output signal of the power DAC, wherein the first DAC is biased with a first supply voltage, and wherein the second DAC is biased with a second supply voltage higher than the first supply voltage when the second input constituent signal is non-zero, and is biased with a third supply voltage lower than the first supply voltage when the second input constituent signal is zero.