Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Patent
1997-10-29
1999-11-23
Cunningham, Terry D.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
327538, G05F 302
Patent
active
059907290
ABSTRACT:
A semiconductor integrated circuit can precisely identify the level of an external input signal by stably supplying an internally stepped down voltage. It comprises a first N-channel MOS transistor having its drain/source connected between an external voltage supply node supplied with an external voltage and a first step-down output node for outputting a first stepped down voltage and its gate supplied with a control voltage higher than the external voltage, a first circuit supplied with the first stepped down voltage as operating voltage from the first step-down output node, a second N-channel MOS transistor having its drain/source connected between the external voltage supply node and a second step-down output node for outputting a second stepped down voltage and its gate supplied with the control voltage higher than the external voltage and having a drive capacity different from that of the first N-channel MOS transistor, the second step-down output node being separated from the first step-down output node and a second circuit supplied with the second stepped down voltage as operating voltage from the second step-down output node.
Koyanagi Masaru
Kozuka Eiji
Cunningham Terry D.
Kabushiki Kaisha Toshiba
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