Circuit for generating input transition detection pulse

Details Circuit for generating input transition detection pulse Circuit for generating input transition detection pulse

1994-10-17

1995-06-20

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Rectangular or pulse waveform width control

327270, 327294, H03K 386

Patent

active

054263905

ABSTRACT:
In input transition detection pulse generators used in semiconductor memory devices, etc., in order to permit a designer to arbitrarily design the power supply voltage dependency of an output pulse width in accordance with use, a scheme is employed such that the functional block for detecting transition of an input or inputs to generate a pulse signal or signals, or the functional block for setting the width of each pulse signal is caused to have a function to generate pulse signals having different power supply voltage dependencies of pulse widths to perform a predetermined logical operation by a logical operation unit on the basis of pulse signals from the input transition detection pulse generation block or the pulse width setting block, thus to output a pulse having a pulse width optimum for a power supply voltage used. In place of the logical operation unit, an approach may be employed to select any one of a plurality of units as the input transition detection pulse generation block or the pulse width setting block by using a control signal to output a pulse having any pulse width. Further, the input transition pulse generation block or the pulse width setting block may be constructed to set at least one pulse width of pulses generated therefrom on the basis of a delay time generated by using an RC delay line.

REFERENCES:
patent: 3675133 (1972-07-01), Frankeny et al.
patent: 4583008 (1986-04-01), Grugett
patent: 4675612 (1987-06-01), Adams et al.
patent: 4710904 (1987-12-01), Suzuki
patent: 4713621 (1987-12-01), Nakamura et al.
patent: 4805195 (1989-02-01), Keegan
patent: 4820944 (1989-04-01), Herlein et al.
patent: 5118975 (1992-06-01), Hillis et al.
patent: 5210450 (1993-05-01), Parkinson

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