Reference-waveform generation using debye dielectric dispersion

Abstract

This report discusses the theory, construction, and operation of Reference-WaveforrQ Generators using a tunnel diode transition-waveform generator driving 4. 65 meter (15 foot), 3. 10 meter (10 foot), and 1. 55 meter (5 foot) liquid-dielectric uniform lossy coaxial lines to produce known 0. 2 volt transition waveforms across 50 ohms with (10-90%) transition times from 205 to 560 picosecond. Each resultant Available-Waveform is characterized in terms of its departure from the step response of the uniform lossy coaxial line operating into a 50 ohm load. The liquid dielectric solutions are dispersive with relaxation times of the order of 4 picoseconds in which heptane is the solvent and the ketones, butanone, heptanone and octanone are the solutes in concentrations ranging from 0. 25to 2-molal.

Reference Pulse Generators: Theory Application and Status of Development

“…The answer to the second question depends on the choice of methodology. One possible method is as follows: (4) normalize both the pulse ea(t) and the measured tiavefoi-ii; e it) to unity, (2) shift the :omalized data sets so that they intersect at an amplitude of 0.5, and (3) compute and graph the squared difference, Fig. 3.…”

Pulse transition duration measurements and standards at NBS - 1975 to 1988

“…The deconvolution techniques and sampler models were those discussed in Section 3.2.2 (from [12] and [28]). The low-pass filter parameters were determined through independent timeand frequency-domain measurements as described in [33]. Fig 4.12 demonstrates the agreement between theory and experiment.…”

“…A reference pulse generator is a generator that produces a pulse of known mathematical (or numerical) form [33].…”

Reference Waveform Flat Pulse Generator

“…The voltage step-like transition generator produces a noninstantaneous voltage transition from an initial voltage level to a final one. An equivalent circuit for the voltage transition generator may be characterized in terms of the step response Eg,,(s) of a four-terminal network having a voltage transfer U.S. Government work not protected by U.S. copyright [11 [2] [31 [4] e (t)…”