This paper presents a digital amplitude modulator (DAM) for polar transmitter in 90 nm CMOS technology. It consists of 255 basic cells digitally activated by an 8-bit amplitude code to shape a non-constant envelope RF output. To reduce the aliases due to the discrete-time to continuous-time conversion a 2-fold interpolation has been implemented. It reaches an output power of -2.5 dBmRMS using a WLAN OFDM 64QAM modulation at 2.45GHz achieving -26.1 dB error vector magnitudes (EVM) and 18% drain efficiency. The 8-bit are segmented addressed. This results in a very compact 0.007 mm(2) chip area

Chironi, V., Debaillie, B., Baschirotto, A., Craninckx, J., Ingels, M. (2010). An Area Efficient Digital Amplitude Modulator in 90nm CMOS. In 2010 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS (pp.2219-2222). IEEE [10.1109/ISCAS.2010.5537206].

An Area Efficient Digital Amplitude Modulator in 90nm CMOS

BASCHIROTTO, ANDREA;
2010

Abstract

This paper presents a digital amplitude modulator (DAM) for polar transmitter in 90 nm CMOS technology. It consists of 255 basic cells digitally activated by an 8-bit amplitude code to shape a non-constant envelope RF output. To reduce the aliases due to the discrete-time to continuous-time conversion a 2-fold interpolation has been implemented. It reaches an output power of -2.5 dBmRMS using a WLAN OFDM 64QAM modulation at 2.45GHz achieving -26.1 dB error vector magnitudes (EVM) and 18% drain efficiency. The 8-bit are segmented addressed. This results in a very compact 0.007 mm(2) chip area
paper
2-fold interpolation; CMOS; WLAN OFDM QAM modulation; amplitude code; continuous-time conversion; digital amplitude modulator; discrete-time conversion; error vector magnitudes; frequency 2.45 GHz; nonconstant envelope RF output; polar transmitter; size 90 nm; word length 8 bit; CMOS integrated circuits; OFDM modulation; interpolation; modulators; quadrature amplitude modulation; wireless LAN
English
International Symposium on Circuits and Systems Nano-Bio Circuit Fabrics and Systems (ISCAS 2010) MAY 30-JUN 02
2010
2010 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS
978-1-4244-5309-2
2010
2219
2222
5537206
none
Chironi, V., Debaillie, B., Baschirotto, A., Craninckx, J., Ingels, M. (2010). An Area Efficient Digital Amplitude Modulator in 90nm CMOS. In 2010 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS (pp.2219-2222). IEEE [10.1109/ISCAS.2010.5537206].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/36981
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