Abstract
A broadband radio frequency phase shifter has been designed which provides a continuous 360° variation of the phase angle. This phase shifter is suitable for use with the broadband receiver amplifier and phase-sensitive detector combination frequently found in pulsed NMR spectrometers. A phase shifter operating between 3.5 to 76 MHz, which has an almost linear variation of the electrical phase angle with the manually adjusted phase control setting, is described in detail. While this particular phase shifter is useful for resistive magnet spectrometer applications it would be possible to cover higher frequency ranges if necessary.
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