Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1977-11-28
1979-12-18
Zazworsky, John
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307232, 328109, 328112, 328162, H03K 5153, H03K 518
Patent
active
041796250
ABSTRACT:
A novel pulse detection circuit for recognizing undesirable noise pulses within digital logic circuitry is disclosed. The detection circuit allows for pulse amplitude and pulse width discrimination and will generate output signals indicative of the presence of pulses of amplitude greater than a selected amplitude and width less than a selected duration. Logic voltage comparators and a variable reference voltage source are used to allow for variable pulse amplitude discrimination of both positive transition and negative transition incoming signals. An incoming signal of greater amplitude than a reference signal will be reflected in both a direct output pulse signal and an inverted output pulse signal of the voltage comparators. The direct output pulse signal is applied to a first flip-flop after being delayed by a first given interval of time. The inverted output pulse signal is delayed by a second interval of time and is then utilized to set a second flip-flop whose output is an input signal to the first flip-flop. The first flip-flop will be set only if the delayed trailing edge of the inverted output pulse signal sets the second flip-flop prior to the arrival of the delayed leading edge of the output pulse signal at the first flip-flop. Additionally, the leading edge of the direct output pulse signal of the voltage comparators is utilized to set a third flip-flop which in turn resets the second flip-flop to enable the circuit for detection of subsequently occurring pulses.
REFERENCES:
patent: 3204189 (1965-08-01), Trautwein
patent: 3634869 (1972-01-01), Hsueh
patent: 3689846 (1972-09-01), Naeyaert
L. G. Walewski, "Digital-Pulse Filter and Delay" IBM Technical _Disclosure Bulletin, vol. 18, No. 9, Feb., 1976 p. 2755.
Bell Telephone Laboratories Incorporated
Visserman Peter
Zazworsky John
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