| CPC G05F 1/56 (2013.01) [G06F 1/28 (2013.01); H03M 1/12 (2013.01)] | 20 Claims |
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1. A system comprising:
a voltage divider configured to receive a first voltage signal from a voltage bus and output a second voltage signal at an output port, wherein the second voltage signal is lower than the first voltage signal;
a current sense resistor coupled to the voltage bus, wherein a first end of the current sense resistor is configured to output a positive output voltage signal and a second end of the current sense resistor is connected to ground;
an amplifier comprising:
a first amplifier input terminal connected to the first end of the current sense resistor; and
a second amplifier input terminal connected to ground; and
an amplifier output terminal;
a switch comprising:
a first switch input terminal connected to the output port of the voltage divider;
a second switch input terminal connected to the amplifier output terminal of the amplifier; and
a switch output terminal;
an analog-to-digital converter (ADC) comprising an ADC input terminal connected to the switch output terminal and an ADC output terminal;
a multiplexer/demultiplexer connected to the ADC output terminal and configured to store, in a first operating state, voltage information in a voltage register and, in a second operating state, current information in a current register;
a power register coupled to the voltage register and the current register and configured to store power information computed based on the voltage information and the current information;
an accumulator connected to the power register and configured to determine a system power corresponding to the voltage bus based on the power information; and
an electronic system coupled to the voltage bus and configured to compute configuration data based on the system power, wherein:
the amplifier is operable to adjust a gain of the amplifier based on the configuration data; and
the ADC is operable to adjust a sampling rate of the ADC based on the configuration data.
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