Electrical transmission or interconnection systems – Personnel safety or limit control features – Interlock
Patent
1986-12-02
1988-05-24
Zazworsky, John
Electrical transmission or interconnection systems
Personnel safety or limit control features
Interlock
328151, 328116, 324103P, H03K 5153
Patent
active
047468165
ABSTRACT:
Circuitry for detecting a pulse having a duration as short as 10 nanoseconds. The circuitry includes a storage device for storing the peak amplitude of the pulse. Signal resolution enhancement circuitry is responsive to the storage device for establishing a plurality of channels respectively corresponding to a plurality of signal amplitude ranges where the range of signal amplitudes for each successive range is larger than that of the range preceding it. Peak signal detecting circuitry is responsive to the signal resolution enhancement circuitry for (a) scanning the channels, (b) selecting one of the channels, the selected channel being such that the peak amplitude falls within the range for the channel, and (c) detecting the peak amplitude of the pulse.
Probe 10 in FIG. 1, may be replaced by an electrostatic sensor, the high input impedance of amplifiers 16 and 18 of FIG. 1 is within range of standard electrostatic charge measurements, thus the invention becomes an electrostatic sensing device.
REFERENCES:
patent: 3769594 (1973-10-01), Wawra et al.
patent: 3792195 (1974-02-01), Wilson et al.
patent: 3869624 (1975-03-01), Fletcher et al.
patent: 3896390 (1975-07-01), Bumgardner
patent: 3973197 (1976-08-01), Meyer
patent: 4121119 (1978-10-01), Meigs et al.
patent: 4373140 (1983-02-01), Chin
Ferguson Jr. Gerald J.
Foycik, Jr. Michael J.
Hoffman Michael P.
Pace Incorporated
Zazworsky John
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