Abstract: A polar transmitter using a new linear-assisted delta-modulation (LADM) envelope-amplifier has been developed for WCDMA applications. The LADM system is composed of a highly efficient ...

One solution is to use an 8-bit microcontroller combined with a 4-bit fixed voltage reference (FVR) module to generate an analog signal using sigma-delta modulation (SDM ... Figure 1 shows the first ...

Abstract: This paper presents a 2.4-GHz high-performance frequency-hopping (FH) transmitter using two-point delta-sigma modulation (TPDSM). Two bottleneck problems in the implementation have been ...