Abstract: Charging circuit for energy store of a portable electrical device has a first resonance switching circuit with a first receiver coil for receiving an alternating magnetic field which induces an electric voltage in the first coil, and an electrical component connected to a terminal of the first coil. The first coil and the further electrical component determine a resonance frequency (f0) of the first resonance switching circuit, A second resonance circuitry is also provided and has a second receiver coil and a further electrical component which determine a resonance frequency (f1, fn) of the second resonance circuitry. The resonance frequency of the second resonance circuitry is an integer multiple of the resonance frequency of the first resonance switching circuit. Receiver coils of the resonance circuitry are disposed such that during operation they are permeated by the same magnetic field lines of the alternating magnetic field.

Abstract: Charging circuit for energy store of a portable electrical device has a first resonance switching circuit with a first receiver coil for receiving an alternating magnetic field which induces an electric voltage in the first coil, and an electrical component connected to a terminal of the first coil. The first coil and the further electrical component determine a resonance frequency (f0) of the first resonance switching circuit, A second resonance circuitry is also provided and has a second receiver coil and a further electrical component which determine a resonance frequency (f1, fn) of the second resonance circuitry. The resonance frequency of the second resonance circuitry is an integer multiple of the resonance frequency of the first resonance switching circuit. Receiver coils of the resonance circuitry are disposed such that during operation they are permeated by the same magnetic field lines of the alternating magnetic field.

Abstract: According to the present invention, a mobile communications terminal includes a high accuracy clock for providing a timebase in a normal operating mode, a "slow clock" for providing the timebase in a low power mode of operation, and at least one processor coupled to the high accuracy clock and the "slow clock" for controlling the modes of operation. In a preferred embodiment, the mobile communications terminal includes a conversion signal processor (CSP), a digital signal processor (DSP), a communications protocol processor, and a radio frequency (RF) segment. The CSP, which includes a plurality of registers, interfaces with the DSP to execute the timing control functions for the terminal. In the normal operating mode, the timebase is maintained from the high accuracy clock. During inactive periods of terminal operation (e.g.

Abstract: A time division multiple access digital transmission system is provided in which the various clock systems in mobile radio stations are derived from the same reference clock signal generator which is controlled with an adjustment signal (adj) which is a function of at least a derivate (TOI.sub.d) of a determined time delay (TOI) between a received time slot position and an expected time slot position. Preferably, the control function also includes a mean (TOI.sub.m) of the determined delay.