Voltage detector

A power voltage protector, comprises:

• a power voltage detector (“PVD”) comprising:
• voltage sensor for sensing supply voltages;
• and
• a logic for combining the sensed supply voltages to generate a PVD output indicative of whether the sensed supply voltages have met one or more predefined thresholds,
• wherein each of the voltage sensors has diode-connected transistors and passive resistance,
• wherein the diode-connected transistors and the passive resistance are serially connected for generating an output, and
• wherein the output is coupled to an input of the logic;
• an oscillator;
• a divider;
• a bandgap circuit for generating a bandgap output;
• and
• at least one regulator for generating a regulator output,
• wherein inputs of the oscillator are coupled to the bandgap output, the PVD output and a power down control signal,
• wherein the output of the oscillator and the PVD output are coupled to inputs of the divider for generating a divider output, and
• wherein the divider output and the bandgap output are coupled to inputs of the at least one regulator for generating a regulator output.

A power voltage detector comprises:

• means for voltage sensing of supply voltages;
• and
• means for applying a NAND logic function on the sensed supply voltages to generate a logic output indicative of whether the sensed supply voltages have met one or more predefined thresholds,
• wherein said means for voltage sensing has voltage sensors,
• wherein each of the voltages sensors comprises diode-connected transistors and means for voltage dividing,
• wherein the diode-connected transistors and the means for voltage dividing are serially connected for generating an output, and
• wherein the output is coupled to an input of the logic.