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uPC1253H2 - RMS Level Sensor
RMS-30 - Level 7 (LO Power 7 dBm) 200 to 3000 MHz
AD636 - Low Level/ True RMS-to-DC Converter
NTE1795 - Integrated Circuit RMS Level Sensor
THAT2252 - IC RMS-Level Detector
DBX2252 - TRUE RMS LEVEL DETECTOR