Abstract: An operating device for electronic switching devices, which operating device includes a front plate, one or more actuators applied to the from plate for the purpose of actuating one or more modules, a changeable from foil which can be applied to the front plate and which is designed to hold a coding, a recognition system which reads in the data of the coding, and an intelligent control device which picks up the read-in data from the recognition system and assigns, in dependence on the read-in data, a user-specific activation function to each actuator.

Abstract: A monolithic integrated wideband power amplifier circuit has a push-pull output stage, a driver stage, a difference stage which receives an input voltage signal and provides a difference signal, and the improvement of an operating point setter which receives the difference signal and controls the operating point of the circuit through a settable resistor. The setting of the operating point is independent of the gain of the output stage, and both are independent of temperature. The bipolar NPN transistors of the push-pull output stage consists of parallel-connected subtransistors which are arranged in the integrated circuit layout according to their characteristics and specific use, so as to minimize parasitic capacitances and resistances and to keep the upper cutoff frequency as high as possible.