Reference voltage generating circuit of semiconductor memory apparatus
First Claim
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1. A voltage generating circuit of a semiconductor integrated circuit, comprising:
- a voltage controller adapted to receive an external supply voltage, detect the level of the external supply voltage, and output a voltage control signal, wherein the voltage controller is adapted to output the voltage control signal that is enabled when the external supply voltage is higher than a predetermined voltage and disabled when the external supply voltage is lower than the predetermined voltage;
a voltage supplier adapted to receive the voltage control signal and output one of the external supply voltage and a first internal voltage as an output voltage in response to the voltage control signal; and
a first reference voltage generator adapted to receive the output voltage of the voltage supplier as a voltage source and generate a first reference voltage.
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Abstract
A voltage generating circuit of semiconductor integrated circuit includes: a voltage controller that detects the level of an external supply voltage and outputs a voltage control signal; a voltage supplier that outputs the external supply voltage or a first internal voltage in response to the voltage control signal; and a first reference voltage generator that is supplied with an output voltage of the voltage supplier and generates a first reference voltage.
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Citations
17 Claims
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1. A voltage generating circuit of a semiconductor integrated circuit, comprising:
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a voltage controller adapted to receive an external supply voltage, detect the level of the external supply voltage, and output a voltage control signal, wherein the voltage controller is adapted to output the voltage control signal that is enabled when the external supply voltage is higher than a predetermined voltage and disabled when the external supply voltage is lower than the predetermined voltage; a voltage supplier adapted to receive the voltage control signal and output one of the external supply voltage and a first internal voltage as an output voltage in response to the voltage control signal; and a first reference voltage generator adapted to receive the output voltage of the voltage supplier as a voltage source and generate a first reference voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A voltage generating circuit of a semiconductor integrated circuit, comprising:
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a voltage controller adapted to receive and detect a level of an external supply voltage and output a voltage control signal, wherein the voltage controller is adapted to output the voltage control signal that is enabled when the external supply voltage is higher than a predetermined voltage and disabled when the external supply voltage is lower than the predetermined voltage; a voltage supplier adapted to receive the voltage control signal and output one of the external supply voltage and a first internal voltage as an output voltage in response to the voltage control signal; a first reference voltage generator adapted to receive the output voltage of the voltage supplier as a voltage source and generate a first reference voltage; and a second reference voltage generator adapted to receive the output voltage of the voltage supplier as a voltage source and generate a second reference voltage in response to the first reference voltage. - View Dependent Claims (16, 17)
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Specification