POWER-ON RESET CIRCUIT
First Claim
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1. A power-on reset circuit comprising:
- a reset starting circuit for generating a reset starting signal in response to a power voltage;
a reset finishing circuit for generating a reset finishing signal when the power voltage reaches a predetermined reset finishing voltage; and
a latch circuit for generating a power-on reset signal having a first state and a second state, wherein;
in response to the reset starting signal, the latch circuit causes the power-on reset signal to transition to the first state, and in response to the reset finishing signal, the latch circuit causes the power-on reset signal to transition to the second state.
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Abstract
A power-on reset circuit has a reset starting circuit, a reset finishing circuit, and a latch circuit. The reset starting circuit generates a reset starting signal in response to a power voltage. When the power voltage reaches a predetermined reset finishing voltage, the reset finishing circuit generates a reset finishing signal. The latch circuit generates a power-on reset signal having a first state and a second state. In response to the reset starting signal, the latch circuit causes the power-on reset signal to transition to the first state. In response to the reset finishing signal, the latch circuit causes the power-on reset signal to transition to the second state.
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Citations
10 Claims
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1. A power-on reset circuit comprising:
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a reset starting circuit for generating a reset starting signal in response to a power voltage;
a reset finishing circuit for generating a reset finishing signal when the power voltage reaches a predetermined reset finishing voltage; and
a latch circuit for generating a power-on reset signal having a first state and a second state, wherein;
in response to the reset starting signal, the latch circuit causes the power-on reset signal to transition to the first state, and in response to the reset finishing signal, the latch circuit causes the power-on reset signal to transition to the second state. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A power-on reset circuit for generating a power-on reset signal in response to a power voltage, comprising:
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a first circuit for causing the power-on reset signal to transition to a first state when the power voltage reaches a first voltage rising from zero;
a second circuit for generating a predetermined second voltage;
a third circuit for generating a detection voltage representative of the power voltage; and
a fourth circuit for comparing the detection voltage and the second voltage so as to causing the power-on reset signal to transition to a second state when the detection voltage reaches the predetermined second voltage. - View Dependent Claims (9, 10)
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Specification