Abstract: A self-propelled harvester is disclosed. The harvester comprises a drive motor, an attachment drive that has a hydraulic pump configured to drive a hydraulic motor to drive an attachment positioned on a feed device of the harvester, and a control device. The control device controls the attachment drive by accessing an attachment-specific parameter set tailored to the attachment that is connected to the harvester so that the hydraulic motor generates an attachment-specific operating torque which is lower than a maximum torque specific to the attachment to be driven. Further, the control device is configured, when a load peak is detected, to control the hydraulic motor to increase the operating torque generated by the hydraulic motor up to the attachment-specific maximum torque by changing a preset pivot angle.

Abstract: According to various embodiments, a circuit for determining the frequency of a signal is described, comprising an input configured to receive an analog input signal, an analog to digital converter configured to convert the analog input signal to a digital input signal, a digital mixer configured to generate a mixing result signal by mixing the digital input signal with a single bit binary signal having a reference frequency, a low pass filter configured to generate a filtered signal by filtering the mixing result signal, a measuring circuit configured to measure the period of the filtered signal and an output configured to output a value differing from the frequency of the single bit binary signal by the inverse of the measured period as the frequency to be determined.

Abstract: A process for preparing 2-methylbenzoxazole by cyclizing acetamidophenol with the simultaneous elimination of the water of reaction. The process involves the drying and melting of the acetamidophenol, the cyclization of acetamidophenol to 2-methylbenzoxazole, and the removal of the water of reaction and the 2-methylbenzoxazole from the reaction mixture after the cyclization step by distillation. All the steps are carried out in a dryer.