title: Adjustable phase device for low-frequency NMR experiments.
abstract: In order to detect low-level NMR signals by bridge methods, a phase displacing device based on principle of voltage addition has been developed allowing the precise bridge balancing over a one decade frequency range. Using analogous multiplier devices for control and adjust circuit the phase adjustment of the output voltage is within +/-3 degrees over a frequency range from 10 to 100 kHz. For input peak-to-peak voltage levels from 0.1 to 1 V the output level is amplitude-stabilized to within 2% for all phase displacements.
authors.affiliation: Physikalisch-Technische Bundesanstalt, Bundesallee 100, D-3300 Braunschweig, Federal Republic of GermanyTechnion, Haifa, Israel.
authors.forename: K
authors.initials: K
authors.lastname: Weyand
authors.forename: E
authors.initials: E
authors.lastname: Simon
authors.forename: Y
authors.initials: Y
authors.lastname: Leuchter