Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Rectangular or pulse waveform width control
Patent
1996-01-26
1997-09-30
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Rectangular or pulse waveform width control
327172, 327173, 327174, 327294, 327299, H03K 513
Patent
active
056729901
ABSTRACT:
An edge-trigger pulse generator that is suitable for use in a signal generator is disclosed, including positive and negative logic embodiments. The positive logic embodiment includes: a first time-delay circuit for delaying and inverting an input pulse; a second time-delay circuit for broadening the width of the input pulse; a NAND gate for receiving outputs of the first time-delay circuit and the second time-delay circuit, and performing a NAND logical operation for the outputs; and an inverter for receiving and inverting output of the NAND gate, so that the width of an pulse output from the edge-trigger pulse generator can be determined merely by the edge-trigger pulse generator while the width of the input pulse is not wider than a predetermined width. The negative logic embodiment replaces the NAND gate with NOR gate and has a second time-delay circuit that is different from the second time-delay circuit of the first embodiment. Both of the embodiments can output a pulse having a width that is wider than a predetermined pulse width to prevent malfunction of a system utilizing the edge-trigger pulse generator as a signal generator.
REFERENCES:
patent: 5309034 (1994-05-01), Ishibashi
patent: 5396110 (1995-03-01), Houston
Callahan Timothy P.
Lam T. T.
United Microelectronics Corporation
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