A Digitally Modulated Class-E Polar Amplifier in 90 nm CMOS

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Abstract

In this paper a digital amplitude modulator for a polar transmitter is presented. The instantaneous output power is modulated by adjusting the amplifiers load through a digitally controlled impedance transformation network. The modulator is suited for modulation schemes with moderate peak-to-average DQPSK. The modulator may power ratio (PAPR), such as also be used for fine gain control in constant envelope modulation schemes. A class E amplifier with digital impedance amplitude modulation is integrated in 90 nm CMOS. It achieves a peak output power of 9 dBm with a PAE of 30% when powered from a 1.2 V supply. The measured EVM is 2.6% for a 6 dBm DQPSK modulated signal with 2 Mb/s signal rate at 2.4 GHz RF frequency.

Autore Pugliese

Tutti gli autori

  • V. Chironi , B. Debaillie , S. D’Amico , A. Baschirotto , J. Craninckx , M. Ingels

Titolo volume/Rivista

IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS. I, REGULAR PAPERS

Anno di pubblicazione

2013

ISSN

1549-8328

ISBN

Non Disponibile

Numero di citazioni Wos

12

Ultimo Aggiornamento Citazioni

28/04/2018

Numero di citazioni Scopus

13

Ultimo Aggiornamento Citazioni

28/04/2018

Settori ERC

Non Disponibile

Codici ASJC

Non Disponibile