Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Amplitude control
Reexamination Certificate
2005-11-01
2005-11-01
Nuton, My-Trang (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Amplitude control
Reexamination Certificate
active
06960953
ABSTRACT:
A semiconductor circuit device, in which an output device is driven by inputting a direct current voltage source having a predetermined potential difference on the high potential side relative to a system ground and a power supply having a potential varied with time relative to the system ground. The semiconductor circuit device includes a voltage conversion circuit which converts an input signal having an amplitude between the system ground and the direct current voltage source into a converted signal having an amplitude between an internal ground and an internal power supply, and outputs the converted signal. The internal ground is controlled to have a potential varied with time relative to the system ground, and the internal power supply is controlled to change according to a change of the internal ground and have the predetermined potential difference on the high potential side when the internal ground has a fixed potential. A selector circuit selects and outputs the input signal and the converted signal according to the potential of the internal ground.
REFERENCES:
patent: 5825205 (1998-10-01), Ohtsuka
patent: 6600357 (2003-07-01), Kirihara
patent: 6724223 (2004-04-01), Ichiguchi et al.
patent: 6768368 (2004-07-01), Kaneko et al.
patent: 2003/0035325 (2003-02-01), Kim et al.
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