Abstract #1788
A NOVEL DSM BASED ALL-DIGITAL IQ MODULATOR FOR A HIGHLY EFFICIENT MRI TRANSMITTER
Filiz Ece Sagcan 1 , Bulent Sen 1 , and Aylin Bayram 1
1
Power Amplifier Technologies, ASELSAN A.S.,
Ankara, Ankara, Turkey
All digital transmitters are gaining interest in
magnetic resonance imaging applications. It provides
high power efficiency during the course of imaging
operation. We propose a novel, delta sigma modulation
based all digital RF modulator. The proposed digital
modulation architecture takes advantage of a digital
single side band (SSB) modulator to save power; and a
CORDIC algorithm to generate multi-band MRI signal with
very high frequency resolution. The modulated digital
signal can then be amplified with a switch-mode power
amplifier to get high efficiency.
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