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Abstract #0923

A self-built two stage stable preamplifier for small coils

Xueming Cao 1 , Maxim Zaitsev 1 , Jrgen Hennig 1 , Jan G Korvink 2 , Oliver Gruschke 2 , and Elmar Fischer 1

1 Department of Radiology, University Medical Center Freiburg, Freiburg, Germany, 2 Institute of Microsystem Technology, Freiburg, Germany

As the coil becomes increasingly smaller and higher gain is required for preamplifiers. However, the stability of the preamplifier conflict with the high gain and the possibilities of oscillation in the preamplifier improve. The unstable performance may also because of the different body noise resistance of the coils. Here, we present some methods that stabilize an unstable two stage preamplifier, while the high gain and other parameters are kept.

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