Abstract
A hybrid computing circuit is described which uses digital logic and analog techniques to provide on-line processing of pulsed NMR signals to give relaxation measurements at low cost. The output is a voltage analog of the relaxation rate in the form Δt T 1 or Δt T 2 , where Δt is the effective measurement interval set by the pulse program, for presentation on a digital voltmeter. The accuracy is better than 0.1%, achieved by a high-precision logarithmic conversion technique in which the data are compared with an exact exponential. The circuit is intended for use with low-resolution instruments and single-line spectra.
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