Podsiadlik, Tomasz and Dooley, John and Farrell, Ronan
Parallelization of Bandpass Sigma-Delta Modulators
for Class-S Digital Power Amplifiers.
In: PhD Research in Microelectronics and Electronics 2010 (PRIME 2010), 18th-21st July 2010, Berlin, Germany.
In this paper a new technique of utilizing parallel
sigma delta modulation for high frequency switch mode digital
power amplifiers is presented. This approach allows achieving a
factor of two increase of a digital logic speed for band-pass SDM
with minor adjustments made. A universal scheme for a SDM
system transformation is provided. Since the transformation
scheme is established, a parallel low-pass SDM, expandable to
a factor of four clock frequency reduction is designed. The
parallelization of a low pass SDM however requires modification
on the form of a Noise Transfer Function in order to preserve
desired speed of a digital logic. This can affect the overall
performance of the SDM. The derivation of the systems is
provided through analysis of discrete time domain equations.
The method is validated through simulations.
Conference or Workshop Item
||Parallelization; Bandpass Sigma-Delta Modulators;
Class-S Digital Power Amplifiers;
||Faculty of Science and Engineering > Electronic Engineering
Dr. Ronan Farrell
||28 May 2012 11:34
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