Name
Abstract | ||
|---|---|---|
This paper presents a digital amplitude modulator for a polar transmitter. The instantaneous output power is modulated by adjusting the amplifier's load through a digitally controlled impedance transformation network. The modulator is suited for modulation schemes with moderate peak-to-average power ratio (PAPR), such as π/4 DQPSK. The modulator may also be used for fine gain control in constant envelope modulation schemes. A class E amplifier with digital impedance amplitude modulation is integrated in 90nm CMOS. It achieves a peak output power of 9dBm with a PAE of 30% when powered from a 1.2V supply. The measured EVM is 2.6% for a 6dBm π/4 DQPSK modulated signal with 2Mb/s signal rate at 2.4GHz RF frequency. |
Year | DOI | Venue |
|---|---|---|
2011 | 10.1109/ASSCC.2011.6123567 | A-SSCC |
Keywords | Field | DocType |
cmos digital integrated circuits,amplifiers,modulators,cmos,dqpsk-modulated signal,evm,pae,papr,constant envelope modulation schemes,digital amplitude modulator,digital impedance amplitude modulation,digitally-controlled impedance transformation network,fine gain control,frequency 2.4 ghz,impedance modulated class-e polar amplifier,peak-to-average power ratio,polar transmitter,size 90 nm,voltage 1.2 v,switched capacitor,power generation,power amplifier,gain control,switches,modulation,impedance,capacitors,cmos integrated circuits,digital controller | Computer science,CMOS,Modulation,Electrical impedance,Electronic engineering,Amplitude modulation,RF power amplifier,Automatic gain control,Electrical engineering,Amplifier,Phase-shift keying | Conference |
ISBN | Citations | PageRank |
978-1-4577-1784-0 | 1 | 0.45 |
References | Authors | |
3 | 5 | |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Mark Ingels | 1 | 157 | 26.53 |
| V. Chironi | 2 | 15 | 3.96 |
| Björn Debaillie | 3 | 124 | 19.27 |
| A. Baschirotto | 4 | 176 | 54.55 |
| Jan Craninckx | 5 | 756 | 181.43 |