Abstract: In a booting circuit arrangement for a microprocessor (.mu.C) controlling electrical devices, particularly of a motor vehicle, wherein peripheral components (15, 17) of the microprocessor (.mu.C) can be turned off by a voltage supply arrangement (7), and the microprocessor (.mu.C) can be put into an idle or stop mode, and wherein the microprocessor (.mu.C) can be put back into its operating mode from this mode by an external switching signal for running an existing program, in that the external control signal actuates an electronic booting circuit (20, 20') associated with the microprocessor (.mu.C), it is provided, in order to attain a functionally reliable switchover of the microprocessor (.mu.C) regardless of the type and duration of the control signal, that the switching signals reach a timing stage (C1, R8, IC1) in the form of potential jumps, the output (23) of the timing stage switching a pulse (25) of defined length to the interrupt input (INT) of the microprocessor (.mu.

Abstract: Process for the preparation of alkyl aryl ethers by reacting aromatic hydroxy compounds with aliphatic alcohols in the presence of strongly acidic cation exchangers based on synthetic resins using the aromatic hydroxy compound in excess of the aliphatic alcohol.