Fast bidirectional analog switching system for HF pulses of high

Details Fast bidirectional analog switching system for HF pulses of high Fast bidirectional analog switching system for HF pulses of high

1994-09-28

1997-01-07

Wysocki, Jonathan

Electrical transmission or interconnection systems

Switching systems

307146, 327300, 333103, H01P 110

Patent

active

055920314

ABSTRACT:
The object of the disclosed system is the fast switching of high voltage and short duration pulses on loads which requires high instantaneous intensities, in order to provide said pulses in both directions; the system is capable in switching narrow hand signals, and therefore long duration signals. The system is based on a very lower series impedance switching channel which is comprised of two high voltage capacitors (C.sub.1) in series with two rectifying groups (GR.sub.1 and GR.sub.2) connected in opposition and whose conduction status is activated by forced injection, through said groups of a direct current controlled by a reactive network in series with a conventional low voltage unidirectional switch (CBT), thereby providing for its logical control (SL) from digital circuits TTL or CMOS. This system applies more particularly and immediately to wide band units which operates with high frequency radiations, particularly of ultrasonic type, and in fields such as diagnosis and non-invasive medical treatment and non-destructive tests of aeronautical and nuclear structures.

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patent: 4812770 (1989-03-01), Dravkin
patent: 4903280 (1990-02-01), Lang et al.
"Improved Analog Switches and Multiplexers Bring Benefits to Old and New Applications"--Peter Harold (Technology Update--May 14, 1987).
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"Don't Trade Off Analog Switch Specs. VMOS--A Solution to High Speed, High Current, Low Resistance Analog Switches" (Elecrtronic Design 1977).
"Properties For 2D Multiplexed Array For Acoustic Imaging"--J. F. Gelly C. Maerfeld--Ultrasonic Symposium 1981, Siliconix Incorporated (Mospower Design Catalog, Jan. 1983).
"A Two-Dimensional Array Receiver for Reducing Refraction Artifacts in Ultrasonic Computed Tomography of Attention"--Dale W. Fitting et al. (IEEE Transactions of Ultrasonics, Frequency Control vol. UFFC--34 No. 3, May 1987).

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