Semiconductor apparatus for use in low voltage power supply
AssigneeNEC Corporation
InventorDaita Watanabe
Life of this patent
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Abstract
A semiconductor apparatus for use with a low voltage power supply includes an internal circuit that operates in synchronization with a first clock signal that is input from an external terminal or generated by a clock generating circuit, a voltage raising circuit for raising a power supply voltage in synchronization with a second clock signal whose pulse edge does not overlap with that of the first clock signal, and a constant voltage circuit for inputting an output voltage of the voltage raising circuit and supplying a constant voltage as a power supply voltage to the internal circuit.
Claims35
A semiconductor apparatus for use in a low voltage power supply, comprising:
- an internal circuit which operates in synchronization with a first clock signal which is input from an external terminal or generated by a clock generating circuit;
- a voltage raising circuit for raising a power supply voltage in synchronization with a second clock signal whose pulse edge is in delayed synchronization with the first clock signal and does not overlap with that of the first clock signal;
- and
- a constant voltage circuit for inputting an output voltage of said voltage raising circuit and supplying a constant voltage as a power supply voltage to said internal circuit.
A semiconductor apparatus for use in a low voltage power supply, comprising:
- an internal circuit which operates in synchronization with a first clock signal which is input from an external terminal or generated by a clock generating circuit;
- a voltage raising circuit for raising a power supply voltage in synchronization with a second clock signal whose pulse edge does not overlap with that of the first clock signal;
- and
- a constant voltage circuit for inputting an output voltage of said voltage raising circuit and supplying a constant voltage as a power supply voltage to said internal circuit,
- wherein said voltage raising circuit raises the power supply voltage when the power supply voltage is lower than a predetermined value, and
- wherein said voltage raising circuit stops raising the power supply voltage and outputting it when the power supply voltage is equal to or higher than the predetermined value.
A semiconductor apparatus for use with a low voltage power supply, comprising:
- an internal circuit which operates in synchronization with a first clock signal which is input from an external terminal or generated by a clock generating circuit;
- a power supply voltage determining circuit for outputting a determination signal which represents whether or not a power supply voltage is higher than a threshold value;
- a voltage raising circuit for raising the power supply voltage in synchronization with a second clock signal whose pulse edge does not overlap with that of the first clock signal and shutting off an internal circuit current when the power supply voltage becomes equal to or higher than the threshold value as the determined result corresponding to the determination signal;
- a switching circuit for outputting the raised voltage of said voltage raising circuit when the power supply voltage is lower than the threshold value as the determined result corresponding to the determination signal and for outputting the power supply voltage when the power supply voltage is equal to or higher than the threshold value as the determined result corresponding to the determined result;
- and
- a constant voltage circuit for inputting an output voltage of said switching circuit and supplying a constant voltage as a power supply voltage to said internal circuit.
Dependencies are inferred from the claim text.