Title :
Switched mode transmitter architecture using low pass delta sigma modulator
Author :
Rehman, Sami Ur ; Khalid, Muhammad Ali
Author_Institution :
Electr. Eng. Dept., NUST, Pakistan
Abstract :
Several design challenges of a low pass continuous time delta sigma modulator (LP DSM), to be used in switched mode transmitter architecture, have been identified. MATLAB simulations and modulation schemes for LP DSM have been presented. Various analog issues, mainly concerned with loop filter design, are discussed. Finally a highly efficient switched mode transmitter architecture using delta-sigma modulation and class-D amplifier is implemented. The transmitter architecture is operated at 200MHz.
Keywords :
delta-sigma modulation; filters; mathematics computing; power amplifiers; transmitters; MATLAB simulations; class-D amplifier; loop filter design; low pass continuous time delta sigma modulator; switched mode transmitter architecture; Band pass filters; Delta-sigma modulation; Frequency modulation; Linearity; Switches; Transmitters; delta sigma; integrator; linear; power efficient; switched mode;
Conference_Titel :
Emerging Technologies (ICET), 2011 7th International Conference on
Conference_Location :
Islamabad
Print_ISBN :
978-1-4577-0769-8
DOI :
10.1109/ICET.2011.6048491
