Electricity: power supply or regulation systems – Output level responsive – Using a three or more terminal semiconductive device as the...
Reexamination Certificate
2005-02-15
2005-02-15
Sterrett, Jeffrey (Department: 2838)
Electricity: power supply or regulation systems
Output level responsive
Using a three or more terminal semiconductive device as the...
Reexamination Certificate
active
06856123
ABSTRACT:
A semiconductor device having a regulator circuit includes a transistor having a source and a drain connected to a power supply and an output terminal; first and second voltage divider resistance elements connected in series between ground and the transistor output terminal; a differential operational amplifier that differentially amplifies a reference voltage and a voltage divided by the voltage divider resistance elements, and that supplies the amplified voltages to a gate of the transistor, to control an output voltage of the transistor; and a phase compensation capacitor including an interlayer film between electrode layers and overlaid two-dimensionally on the voltage divider resistance elements. The electrode layer close to the semiconductor substrate is connected to the output terminal of the transistor, and a parasitic capacitance between the output terminal of the transistor and the voltage divider resistance elements compensates a phase lag of a transistor output signal.
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Oki Electric Industry Co. Ltd.
Sterrett Jeffrey
Volentine Francos & Whitt PLLC
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