Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Rectangular or pulse waveform width control
Patent
1997-05-09
1998-12-22
Ton, My-Trang Nu
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Rectangular or pulse waveform width control
327291, 327525, H03K 317, H01H 8500
Patent
active
058523790
ABSTRACT:
A tunable phase generator is disclosed suitable for use in integrated circuits. The phase generator includes a delay element wherein passive resistors and conductors are employed to provide relatively constant delays despite changes in operating temperatures and voltages. The phase generator is driven by a clock signal and generates therefrom a self-resettable output signal pulse with a selectable pulse width no longer than the width of the clock signal. The variable widths are provided by varying the delays of the delay elements and adding combinational logic between respective delay elements and at the input and output of the phase generator that ensure that, in most situations, the output signal pulse is reset after a delay that is independent of the pulse width of the clock signal. Delays are lengthened by decreasing the current available to a delay element for charging the capacitors. Delays are decreased by disconnecting at least some of the capacitors so that the corresponding delay element has virtually no delay.
REFERENCES:
patent: 4199726 (1980-04-01), Bukosky et al.
patent: 5600274 (1997-02-01), Houston
patent: 5617049 (1997-04-01), Hirano et al.
patent: 5668751 (1997-09-01), Sher et al.
patent: 5672990 (1997-09-01), Chaw
Crisman Douglas J.
Integrated Silicon Solution Inc.
Nu Ton My-Trang
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