Title :
A 20 MHz BP-PWM and BP-DSM Class-D PA in 0.18 μm CMOS
Author :
Sommarek, Johan ; Saari, Ville ; Lindeberg, Jonne ; Vankka, Jouko ; Halonen, Kari
Author_Institution :
Electron. Circuit Design Lab., Helsinki Univ. of Technol., Espoo
Abstract :
This paper presents a Class-D power amplifier for bandpass pulse width modulated (BP-PWM) and bandpass delta-sigma modulated (BP-DSM) signals at 20 MHz. A 1-bit 6-th order topology is used in the DeltaSigma-modulator. Integral noise shaping is used in the generation of the bandpass pulse width modulated signal. A two sided pulse width modulation is used with a 6-bit 4th-order noise shaper. The push-pull amplifier part of the Class-D amplifier was fabricated on a 0.18 mum CMOS process and the bandpass filter was composed of a LC ladder network realised with discrete components.
Keywords :
CMOS integrated circuits; band-pass filters; delta-sigma modulation; ladder networks; power amplifiers; pulse width modulation; 4th-order noise shaper; CMOS; CMOS process; LC ladder network; bandpass delta-sigma modulated signals; bandpass filter; bandpass pulse width modulated signals; class-D power amplifier; integral noise shaping; push-pull amplifier; Delta modulation; Noise shaping; Power amplifiers; Pulse amplifiers; Pulse generation; Pulse shaping methods; Pulse width modulation; Signal generators; Space vector pulse width modulation; Topology;
Conference_Titel :
Electronics, Circuits and Systems, 2005. ICECS 2005. 12th IEEE International Conference on
Conference_Location :
Gammarth
Print_ISBN :
978-9972-61-100-1
Electronic_ISBN :
978-9972-61-100-1
DOI :
10.1109/ICECS.2005.4633529
