Bruker Biospin Ag

Martin Luke

Daniel Marek

Arthur Schwilch

An electronic interface () between a pure NMR receiver resonator (RO) and a preamplifier is characterized in that one or more control diodes (D, D) are provided by means of which the current designed to flow through the switching diodes can be fed into these switching diodes, and the control diodes are connected to the switching diodes directly or via one or more additional series impedances. In this fashion, the impedance of the resonator is transformed to the required preamplifier or line impedance during the receiving process with little loss. In particular, during the receiving process, matching can be adjusted during the transmitting process, the current in the inductance of the resonator generated by the Bfield of the transmitting resonator is minimized and all components are protected against damage.

Electronic interface for NMR receiver resonators

An electrical circuit with one or more semiconductor components () is characterized in that at least one semiconductor junction of at least one of the semiconductor components of the electrical circuit is disposed such that the average direction of motion of the charge carriers in the semiconductor junction is essentially parallel to the lines of force of the magnetic field B, wherein the corresponding semiconductor component is disposed directly on a substrate (), which is made of a material with good thermal conduction properties. In this way, undistorted characteristics of the semiconductor component used can be ensured despite the very strong magnetic field and the low operating temperatures.

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Faellanden, Switzerland

Martin Luke