Patent ID: 9466337
Filing Date: 2016-10-11
CPC Classification: G01R,G05F,G11C,H03K

Claim Text:
1. An apparatus comprising: a terminal configured to receive a first voltage; a voltage reference circuit coupled to the terminal to receive the first voltage and configured to provide a second voltage responsive, at least in part, to the first voltage; and a voltage detector circuit configured to respond, at least in part, to the first and second voltages and configured to produce an output signal when the first voltage reaches a target level, the voltage detector circuit comprising: wherein the voltage reference circuit comprises: a second transistor including a gate, a source and a drain, wherein the drain is coupled to the terminal via a second resistor, the source is coupled to a reference voltage, and the gate coupled to a first node, wherein the first node is between the drain and the resistor; and a third transistor including a gate, a source, and a drain, wherein the drain is coupled to the terminal via a third resistor, the source is coupled to the reference voltage via a fourth resistor, and the gate is coupled to the first node.