This article presents a wideband, energy-efficient digital transmitter (DTX) suitable for multi-
mode/multi-band wireless communication applications. It features various operation modes …

This work presents a wideband digital polar transmitter (DPTX) with an integrated capacitor-
digital-to-analog converter (C-DAC)-based digital-to-phase converter (DPC). A normalized …

We present a wideband, 12-bit four-way Doherty Cartesian digital transmitter (DTX) featuring
an innovative 50%-LO signed interleaved up-conversion technique that enables close to …

A 15-bit quadrature digital power amplifier (DPA) is presented for wide efficiency
enhancement coverage on the IQ complex plane and high dynamic power range. Complex …

This article presents a wideband-bit direct-digital RF modulator (DDRM) operating in a 0.5-to-
3-GHz band for 5G transmitters. The proposed digital Cartesian modulator features an …

Due to the ever-growing demand for higher throughput and longer range from portable
devices, wireless transmitters (TX) are required to support wider signal bandwidths and …

This article presents a quadrature switched/floated capacitor power amplifier (SFCPA) with
deep back-off efficiency enhancement. The SFCPA is introduced to decrease the dynamic …

This article presents an 8-way serial power combined transformer-based quadrature digital
power amplifier (DPA) with in-phase/quadrature (IQ)-reuse and Doherty techniques for high …

The RF performance of current-scaling digital transmitters (DTX) with polar, unsigned
Cartesian, signed Cartesian, and multiphase architectures have been compared regarding …

This paper presents an advanced yet simple digital pre-distortion (DPD) technique for digital
I/Q transmitters (DTXs). Exploiting the I/Q orthogonality, an effective 2× 1-D DPD procedure …