Semiconductor device for output of pulse waveforms

Details Semiconductor device for output of pulse waveforms Semiconductor device for output of pulse waveforms

2010-03-16

2011-12-27

Luu, An (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Gating

Delay controlled switch

C327S108000, C326S085000, C326S087000

Reexamination Certificate

active

08085081

ABSTRACT:
A semiconductor device has multiple high-side field-effect transistors and multiple low-side field-effect transistors connected to a single output terminal to generate an output signal. A driver circuit outputs driving signals that turn the field-effect transistors on and off. The driving signal for the field-effect transistors on each side is conducted by a salicided gate line with salicide block areas that produce successive delays, causing the field-effect transistors to turn on sequentially. Alternatively, the transistors have different threshold voltages, or the driving signals for different transistors are output from drivers with different driving abilities, again causing the transistors to turn on sequentially. The output signal therefore rises and falls gradually, reducing electromagnetic interference.

REFERENCES:
patent: 6232814 (2001-05-01), Douglas, III
patent: 6366129 (2002-04-01), Douglas et al.
patent: 6373300 (2002-04-01), Welch et al.
patent: 6879205 (2005-04-01), Courau
patent: 2002-057566 (2002-02-01), None

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