Voltage detection circuit
AssigneeNXP B.V.
InventorsSiamak Delshadpour, Ahmad Dashtestani
Life of this patent
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Abstract
A voltage detection circuit including an input voltage stage configured to scale down an input voltage to produce a scaled down voltage, a gain loss stage configured to receive and adjust the scaled down voltage based on a determined gain or loss to be applied to the scaled down voltage, and a comparison circuit configured to determine if the input voltage is over or under a desired voltage value.
Claims19
A voltage detection circuit, comprising:
- an input voltage circuit configured to scale down an input voltage to produce a scaled down voltage;
- a gain loss circuit configured to receive and adjust the scaled down voltage based on a determined gain or loss to be applied to the scaled down voltage;
- and
- a comparison circuit configured to determine if the input voltage is over or under a desired voltage value;
- wherein the gain-loss circuit includes a parallel resistor arrangement with a switch associated with each parallel resistor.
The voltage detection circuit of clam 1, comprising a comparator circuit, wherein an output of the parallel resistor arrangement is input to the comparator.
A method of detecting a voltage, comprising:
- inputting an input voltage;
- scaling down the input voltage;
- adjusting the scaled down voltage using a parallel arrangement of resistors and inputting the adjusted voltage to a first comparator;
- outputting an output voltage from the comparator;
- and
- using the output voltage in a comparison circuit to determine if the input voltage is within a desired range.
A voltage detection circuit, comprising:
- an input voltage circuit configured to scale down an input voltage to produce a scaled down voltage;
- a gain loss circuit configured to receive and adjust the scaled down voltage based on a determined gain or loss to be applied to the scaled down voltage;
- and
- a comparison circuit configured to determine if the input voltage is over or under a desired voltage value;
- wherein the gain-loss circuit uses a reciprocal of the scaled down voltage to determine an output of the gain-loss circuit.
Dependencies are inferred from the claim text.