True RMS converter board

Details True RMS converter board True RMS converter board

2006-10-31

2006-10-31

Nguyen, Vincent Q. (Department: 2858)

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

C356S218000

Reexamination Certificate

active

07129689

ABSTRACT:
A true RMS conversion circuit. A test apparatus includes a transmitter source including AC and DC supplies. The transmitter source can connect to a transmitter. The test apparatus includes an optical receiver to receive optical signals from a transmitter coupled to the transmitter source. The optical receiver includes an amplifier with a differential output. The test apparatus also includes a matching networks connected to a high and low outputs. Also included in the test apparatus are filters connected to the matching networks. The filters are designed to separate AC and DC signals. An RMS conversion circuit is connected to the filters such that the RMS conversion circuit receives AC signals from the filters. The RMS conversion circuit converts the AC signals to a DC function of the RMS value of the AC signals. A data acquisition system is connected to the RMS conversion circuit to receive the function of the RMS value of the AC signals. The data acquisition system is connected to the filters to receive DC signals from the filters.

REFERENCES:
patent: 5548399 (1996-08-01), Takai et al.
Analog Devices, “LF to 2.5 GHz TruPwr Detector,” 2001.

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