Title: One shot multivibrator circuit

Abstract: An improved one shot multivibrator circuit is described which is particularly adapted for use with field-effect transistor (FET) manufacturing techniques such as metal oxide semiconductor (MOS) large scale integration (LSI) manufacturing techniques. Such a one shot multivibrator circuit is particularly adapted for FET application because the period of its output pulse is independent of the threshold voltages of the transistors used in the circuit design. The one shot multivibrator circuit comprises a capacitor for fixing the period of the output pulse; a bias network including a current mirror as a constant current source for charging the capacitor; a first inverter stage comprising a switching transistor and a load transistor for controlling the charging and discharging of the capacitor; and a second inverter stage as the output stage for providing the output pulse having its turn-on controlled by the first inverter stage and its turn-off controlled by the voltage level on the capacitor.

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Inventors: Lockwood, George C. (Dayton, OH, US)

Application Number: 575912
Filing Date: 1975-05-09
Publication_date: 1976-12-07
Assignee: NCR Corporation (Dayton, OH)
Primary Class(es): 327/172 257/E27.06, 327/227
Other Classes:
US Patent Ref:

3678407	Jul, 1972	Ahrons	330/35.
3691537	Sep, 1972	Burgess	307/279.
3719835	Mar, 1973	Eberhard	307/273.
3770987	Nov, 1973	McSweeney	307/273.

Other Refs: 939,599

Oct, 1963	UK

Primary Examiner: Heyman, John S.
Assistant Examiner: Anagnos, Larry N.
Attorney: Cavender; J. T., Benjamin; Lawrence P.