System and method for providing low-voltage, self-powered voltage multi-sensing feedback

摘要

A system and method are provided for regulating a supply voltage of a device. The method includes the steps of determining whether a supply voltage for an analog multiplexor is below a threshold voltage. If the supply voltage for the analog multiplexor is below the threshold voltage, then the method includes the step of shorting the supply voltage to an output of the analog multiplexor. However, if the supply voltage for the analog multiplexor is above or equal to the threshold voltage, then the method includes the step of transmitting at least one input signal coupled to the analog multiplexor to the output of the analog multiplexor. A system configured to implement the method may include a power management integrated circuit configured to generate a supply voltage for a device and a device that includes a self-powered analog multiplexor with voltage sensing bypass switch.

主权项

1. A method comprising:
determining whether a supply voltage for an analog multiplexor is below a threshold voltage; and if the supply voltage for the analog multiplexor is below the threshold voltage, then shorting the supply voltage to an output of the analog multiplexor, or if the supply voltage for the analog multiplexor is above or equal to the threshold voltage, then transmitting at least one input signal coupled to the analog multiplexor to the output of the analog multiplexor, wherein the analog multiplexor includes a plurality of p-type metal oxide semiconductor (PMOS) transistors, each PMOS transistor having an n-type well biased by the supply voltage.