A 65nm CMOS I/Q RF power DAC with 24–42dB 3rd harmonic cancellation and up to 18dB mixed-signal filtering

Abstract

This paper presents an RF DAC transmitter (TX) with integrated, programmable harmonic cancellation as well as mixed-signal filtering at a peak power of 25.6dBm. The 65nm CMOS prototype uses device stacking and transformer combining and demonstrates 24dB to 42dB HD3 reduction across a frequency range of 0.7GHz to 2GHz, and up to 18dB of notching at a 40MHz offset.