Pulse shaper for coaxial cable system
AssigneeThe Ohio State University
InventorsJonathan D. Young, Ross Caldecott
Life of this patent
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Abstract
A synchronizing, pick-off type circuit for use with underground detection systems of a variety utilizing a high voltage pulse generator generating pulses by dielectric breakdown over a gap and evidencing a sustained and discernable substantially lower voltage level for a short interval following the pulse. Pick-off is derived by tapping a transmitting coaxial cable with a "T" connection carrying a choke inductor and a resistor, each of which is coupled to the central conductor of the coaxial cable and which are mutually connected in parallel circuit relationship.
Claims5
For use in conjunction with a high voltage pulse generator of the coaxial tube type wherein a charge is capacitively accumulated at one side of a gap within said tube until dielectric breakdown occurs thereacross to produce an output signal at an opposite side of said gap, said opposite side being connected with a coaxial cable having a central conductor and an outer conductive sheath, said output signal being characterized by a high voltage pulse signal portion of very short duration and a contiguous, subsequent sustained signal portion of substantially lower voltage, the improved generating circuit for forming substantially sustained trigger signals from the two said output signal portions and asserting said trigger signals at a load, said generating circuit comprising:
- a resistance connected to said central conductor for acting in voltage dividing relationship with said load for forming a portion of sustained trigger signal;
- and
- a choke coupled in parallel circuit relationship with said resistance for forming another portion of said sustained trigger signal.
Dependencies are inferred from the claim text.