Back to results
US 6,204,699 B1Granted
Voltage detection circuit
AssigneeNEC Corporation
InventorMamoru Shimazaki
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeNEC Corporation
InventorMamoru Shimazaki
Estimating the term…
A voltage detection circuit is capable of detecting a low voltage without malfunctioning, and this so even if the voltage is lower than a minimum operating voltage. The voltage detection circuit includes two input terminals, a voltage selecting circuit, and a voltage-detecting integrated circuit (IC). In operation, a standard voltage is input into a first input terminal of the voltage detection circuit and the voltage to be detected is input into the second input terminal. The first terminal voltage is then divided by a voltage divider circuit. This divided voltage and the voltage to be detected are input into the voltage selecting circuit, which outputs one of the voltages to the voltage detecting IC. The voltage detecting IC compares the input voltage to a detection voltage and outputs a value accordingly. To ensure that the detection circuit will function properly at all times, the voltage selection circuit inputs the divided voltage into the voltage detecting IC when the voltage to be detected falls below the minimum operating voltage.
A voltage detection circuit comprising:
A method for detecting a state of operation of a circuit, comprising:
A voltage detection circuit comprising:
Dependencies are inferred from the claim text.