Field-Effect-Transistor Thermal Converters

Inhalt:
Field-Effect Transistor Thermal Converters use FET heaters working as dynamically controllable impedances and allow the multiplication of alternating quantities to be made with measurement uncertainties of some parts in 10⁶. The device represents a milestone in highly accurate measurements of effective values (or root-mean-square - rms values) and product (correlation) of two ac quantities and can be used in rms detectors, a variety of precision scientific instrumentation such as digital multimeters, high frequency gain control, power and noise measurement, and phase detection.