Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Having specific delay in producing output waveform
Patent
1995-03-10
1996-08-20
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Having specific delay in producing output waveform
327277, 327284, 327288, 327362, H03H 1126
Patent
active
055482376
ABSTRACT:
A process tolerant delay circuit includes a plurality of inverters that receive an input signal and provide an output signal related to the input signal but including a propagation delay of the plurality of inverters. At least one inverter comprises FETs of minimum channel lengths dependent upon a fabrication process by which the circuit was made. Accordingly, the plurality of inverters have a propagation delay dependent upon the fabrication process. A delay compensation device receives the output signal of the inverters and provides a compensated output signal related to the received signal but including a variable delay established in accordance with a control signal. A process sense stack provides the control signal only during a transition of the input signal, and with a value dependent upon a channel length of a FET device thereof. Thus, the plurality of inverters and delay compensation device operate together, per the control signal of the process sense stack, to provide a circuit capable of compensating for process degradations in order to provide a given delay in accordance with variations in the fabrication process by which they were made.
REFERENCES:
patent: 4720670 (1988-01-01), Boyle
patent: 5021684 (1991-06-01), Ahuja et al.
patent: 5051630 (1991-09-01), Kogan et al.
patent: 5055715 (1991-10-01), Inaba
patent: 5059838 (1991-10-01), Motegi et al.
patent: 5231319 (1993-07-01), Crafts et al.
patent: 5300837 (1994-04-01), Fischer
patent: 5451894 (1995-09-01), Guo
IBM Technical Disclosure Bulletin, "Process Tracking Delay Element", Author--M. Ueda; vol. 36, No. 09A, Sep. 1993.
Iadanza Joseph A.
Ueda Makoto
Callahan Timothy P.
International Business Machines - Corporation
Nu Ton My-Trang
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