Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Patent
1994-02-08
1995-10-10
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
327306, 327333, 327544, 327546, H03K 301
Patent
active
054574218
ABSTRACT:
A voltage step-down circuit to be built in a highly integrated semiconductor IC chip, including a voltage divider and a voltage comparator. A divided output voltage V.sub.INT of the voltage divider and a comparison reference voltage V.sub.REF are applied to respective input terminals (-) and (+) of the voltage comparator. An output signal of the voltage comparator is supplied to a control signal generator section of the voltage divider to generate control pulses and to control the connection of capacitors of a voltage divider section of the voltage divider with the control pulses so as to supply the divided output voltage V.sub.INT to a load circuit. In this case, the capacitors are used as a voltage divider for generating a voltage for an internal circuit from an external power source voltage. Thus, power loss can be reduced and utilization efficiency of the capacitors is raised. Hence, the voltage step-down circuit is suitable for highly integrated semiconductor IC chip.
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Callahan Timothy P.
NEC Corporation
Wells Kenneth B.
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