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 Variable propagation delay digital signal inverter

Details
Inventors: Fernandez, Francisco J.; Viswanathan, Thayamkulangara R.;
Assignee: AT&T Corp. (Murray Hill, NJ)
Primary Examiner: Callahan; Timothy P.
Assistant Examiner: Englund; Terry L.
Attorney, Agent or Firm: Skaist; Howard A.

An electronically-controlled variable propagation delay digital signal inverter comprises a digital signal inverter having an input signal port and an output signal port, and an electronically-controlled negative resistance (ECNR). The ECNR is coupled to the output port of the inverter in a configuration so as to render the propagation delay of the digital signal inverter capable of being varied by varying the resistance of the ECNR. The electronically-controlled variable propagation delay digital signal inverter may be included in a ring oscillator configuration.

DETAILED DESCRIPTION Briefly, in accordance with one embodiment of the invention, an electronically-controlled variable propagation delay digital signal inverter comprises a digital signal inverter, having an input signal port and an output signal port, and an electronically-controlled negative resistance (ECNR).
The ECNR is coupled to the output port of the inverter.



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