Koninklijke Philips Corporation N.V.

U.S. Philips Corporation

Roland Dorfer

Thomas Sigot

Herbert Kampitsch

Matthias Schorn

The invention relates to a food processor ( ) with a motor (M) to drive at least one tool and with input means ( to ) to switch on at least one operating process, with a microcomputer ( ) to control the operating processes and realize a detection stage ( ) for the detection of the interruption of an operating process, which microcomputer contains a memory ( ) for storing operating values present immediately before the interruption of an operating process, the microcomputer ( ) being designed to start the continuation of an interrupted operating process following an activation of a reactivation switch ( to ) provided for the reactivation purpose, the reactivation switch ( to ) preferably being formed by the operating-mode switch ( to ) concerned.

Food processor comprising memory means for storing operational data

In a device (,) having a variable-speed motor (,), a single switching device (,) has been provided for influencing the speed of the motor and for generating turn-off voltage transients (SP) on a coil terminal (,) of the motor. The turn-off voltage transients can be applied to a voltage boosting circuit (,) for generating a d.c. control voltage required for driving a control electrode of the single switching device. This d.c. control voltage is supplied to the control electrode of the switching device with the aid of a control pulse generator (,). The d.c. control voltage reaches a higher value than the d.c. supply voltage (V) applied to the device (,). Preferably, the device includes a starting circuit (,), by which a minimum d.c. control voltage, required for the control electrode of the single switching device, can be generated for the first time in order to drive the single switching device into its conductive state.

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Keutschach, Austria

Roland Dorfer