Power measurement system for multiple power sources and method of operating the same

摘要

A power measurement system for multiple power sources includes a plurality of measurement apparatuses, a multiplexer, and a processing module. Each of the measurement apparatuses has a sense resistor and a sense amplifier. The sense resistor is electrically connected to a power source at one terminal thereof and electrically connected to a load at the other terminal thereof. The sense amplifier receives a voltage difference across the sense resistor, amplifies the voltage difference by a gain value, and outputs an amplified sense voltage. The multiplexer receives the amplified sense voltages and outputs one of the amplified sense voltages. The processing module receives the one amplified sense voltage outputted from the multiplexer and calculates an output power of the power source according to the one amplified sense voltage. Furthermore, a method of operating the power measurement system is provided.

主权项

1. A power measurement system for multiple power sources calculating output powers of different power sources, comprising:
a plurality of measurement apparatuses, each of the measurement apparatuses having:
a sense resistor, one terminal of the sensor resistor electrically connected to a power source and another terminal of the sensor resistor connected to a load; anda sense amplifier configured to receive a voltage difference across the sense resistor, amplify the voltage difference with a gain value, and output an amplified sense voltage; a multiplexer having a plurality of data input terminals, a data output terminal, and at least one data selection terminal, the data input terminals receiving the amplified sense voltages outputted from the measurement apparatuses, respectively; and a processing module configured to output at least one selection signal to the at least one data selection terminal to control the multiplexer selecting one of the amplified sense voltages outputted from the data output terminal of the multiplexer, and receive the selected amplified sense voltage; wherein the processing module is configured to calculate an output power of the power source according to the received amplified sense voltage.