POWER ON DETECTION CIRCUIT

摘要

A power-on-detection (POD) circuit includes a detection circuit, first and second comparison circuits, and logic circuitry. The detection circuit includes a capacitor configured to charge from a first voltage level to a second voltage level. The first comparison circuit is configured to compare a third voltage level to a reference voltage level, and the second comparison circuit is configured to compare a fourth voltage level to the reference voltage level. The third and fourth levels are based on the second voltage level. The logic circuitry is coupled to an output of the first comparison circuit and to an output of the second comparison circuit and is configured to output a power identification signal based on the outputs of the first and second comparison circuits. The detection circuit is configured to turn on the first and second comparison circuits based on a voltage level of the capacitor.

主权项

1. A power-on-detection (POD) circuit, comprising:
a detection circuit including a capacitor configured to charge from a first voltage level to a second voltage level; a first comparison circuit configured to compare a third voltage level to a reference voltage level; a second comparison circuit configured to compare a fourth voltage level to the reference voltage level; and logic circuitry coupled to an output of the first comparison circuit and to an output of the second comparison circuit, the logic circuitry configured to output a power identification signal based on the outputs of the first and second comparison circuits, wherein the third voltage level and the fourth voltage level are based on the second voltage level, and wherein the detection circuit is configured to turn on the first and second comparison circuits based on a voltage level of the capacitor.