Calibratable microwave circuit with illuminable gaas-fet, calibrating device and process
AssigneeRohde & Schwarz GmbH & Co.KG
InventorWilhelm Kraemer
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Abstract
An electronic microwave circuit with GaAs field-effect transistors, which are integrated onto a semiconductor substrate, for switching high frequency electrical input signals has at least one light source for illuminating the GaAs field-effect transistors. The intensity of the light source and/or the color of the light source are changeable during operation. A calibrating device calibrates the intensity and/or color of the light source using a method according to the invention.
Claims15
Electronic microwave circuit comprising GaAs field-effect transistors integrated onto a semiconductor substrate, for switching electronic high frequency input signals and at least one light source for illuminating the GaAs field-effect transistors wherein at least one of the intensity of the light source and the color the light source may be changed during operation.
Calibrating device for calibrating the intensity and/or color of a light source of an electronic microwave circuit, the intensity and/or color of said light source being changeable during operation, said microwave circuit comprising GaAs field-effect transistors illuminable by the light source, with a signal generator for generating high frequency input signals to a calibrating output (29), via which the high frequency input signals are fed to an input (9) of the microwave circuit, with a calibrating input (30) via which the high frequency signals altered by the microwave circuit are fed again to the calibrating device, with a control unit, for controlling the light source and the switching processes of the microwave circuit via a calibrating connection, and of the signal generator, whereby the control unit evaluates high frequency output signals input via the calibrating input (30) and places the result of the evaluation in a store of the microwave circuit.
Dependencies are inferred from the claim text.