Abstract: A broadband magnetic resonance (MR) receiver is described herein. The MR receiver can be used to process nuclear magnetic resonance (NMR) signals. The MR receiver includes a transformer that amplifies the MR signals and a preamplifier that receives the MR signals from the transformer. The preamplifier includes a common-drain amplifier stage and a common-source amplifier stage.

Abstract: A broadband magnetic resonance (MR) receiver is described herein. The MR receiver can be used to process nuclear magnetic resonance (NMR) signals. The MR receiver includes a transformer that amplifies the MR signals and a preamplifier that receives the MR signals from the transformer. The preamplifier includes a common-drain amplifier stage and a common-source amplifier stage.

Abstract: The present invention relates to an axial adjustable, rotary brake device using eddy current resistance, having an annular rotating conductive reaction member fastened on a central axle, having a frame, and fitted with permanent magnets disposed on either one side or both sides of said member, wherein the magnets produce a magnetic field between the magnet arrays, and through the member. Relative motion of the member and magnets produces eddy current resistance opposing the movement of the member. The magnets are mounted such that their respective positions relative to each other and thus to the intermediate conductive member can be changed by an adjusting Structure to increase or decrease the space between magnets and member, (air gap), distance from the rotational center or their relationship to each other. Various other configurations for changing the spatial relationship of magnets and members are presented which can be employed to produce many embodiments and variations of the present invention.

Abstract: An eddy current brake includes a diamagnetic member, a first support wall and a second support wall with the first and second linear arrays of permanent magnets disposed on the walls facing one another. Apparatus is provided for moving at least one of the walls in order to control eddy current induced in the member in the passage of the member therepast to adjust the braking force between the magnets and the member. Apparatus is also provided for causing the velocity of the member to change the braking force between the magnets and the member.

Abstract: Disclosed is a two-level current driver suitable for driving a semiconductor laser for printing applications, the laser driver including a primary power source for producing a first current pulse of amplitude I.sub.1 and of duration T.sub.2, a secondary power source for producing a second current pulse of amplitude I.sub.2 and of duration T.sub.1, means for combining the outputs of the power sources, and sensing means for detecting the current pulse output from the primary power source.