Abstract: A method, digital circuit, and computer program product control a supply voltage of a processing circuit based on a processing clock of the processing circuit. A first clock frequency and at least one second clock frequency are generated, wherein the first clock frequency is used as the processing clock and the second clock frequency is adjusted based on a clock control information issued by the processing circuit. A voltage conversion ratio for converting the supply voltage to a scaled supply voltage applied to the processing circuit is directly controlled in response to the result of a monitored performance under said second clock frequency. Thereby, a new fast automatic voltage scaling approach can be provided which allows to meet critical timing requirements of portable systems and to reduce power consumption significantly.

Abstract: The invention relates to a mobile terminal (20, 30) having a first processing unit (7), a first memory device (21) and SIM card chip (23) including a second memory device (22), the second memory device (22) is reprogrammable. To provide a low price mobile terminal having reduced components and costs and less power consumption the first memory device (21) includes terminal independent data stored in the first memory device (21) before manufacturing of the mobile terminal (20, 30), and individual mobile terminal specific data are stored in the second memory device (22) after manufacturing of the mobile terminal (20, 30).

Abstract: The invention relates to a mobile terminal (20, 30) having a first processing unit (7), a first memory device (21) and SIM card chip (23) including a second memory device (22), the second memory device (22) is reprogrammable. To provide a low price mobile terminal having reduced components and costs and less power consumption the first memory device (21) includes terminal independent data stored in the first memory device (21) before manufacturing of the mobile terminal (20, 30), and individual mobile terminal specific data are stored in the second memory device (22) after manufacturing of the mobile terminal (20, 30).

Abstract: To be able to use a clock generation unit (2) for different mobile radio systems, the clock generation unit (2) which includes a phase-locked loop (4) for converting a reference clock (fR) into a working clock is provided and includes circuit portions (16a, 16b; 20a, 20b) which are designed for different reference clocks (fR) while a respective one of the circuit portions (16a, 20a) to which a special reference clock (fR) is assigned can be selected. The clock generation unit (2) can thus be operated with different reference clocks of different mobile radio systems.

Abstract: A pager system which includes a base transceiver station (2) for the wireless transmission of data in conformity with the GSM standard, an SMS center (5) for the storage of pager short messages, which center is connected to the base transceiver station (2) so as to transmit data, and at least one pager device (9) which includes a transmit/receive unit (2) which operates in conformity with the GSM standard for the wireless reception of pager short messages from the base transceiver station (2), an output unit (15) which is connected to the transmit/receive unit (10) so as to transmit data for the display of the pager short messages received, and a power consumption control unit which is constructed in such a manner that it switches over the pager system (1) from a normal mode of operation to a power saving mode for selectable periods of time.

Abstract: A telecommunication device has a processor for processing data and a memory which stores the data. The memory is coupled to the processor by a data bus and an address bus. A first address counter provides an output address to the memory for reading out a desired data having the output address. A count of the first address counter is changed to a current address in response to a control signal from the processor, each time the processor generates a desired address. The current address is provided to the memory as the output address which is also the desired address. A comparator compares the desired address with the output address from a second address counter and outputs a load signal to the first counter when the current address from the second address counter differs from the desired address. The load signal loads the desired address in the first counter over the address bus when the current address differs from the desired address so that the output address is equal to the desired address.

Abstract: A mobile radio system includes a mobile radio base station and a user voice and/or data terminal remote therefrom, the base station being coupled to the user terminal by an ISDN standard bus system which provides channels for digital control and other information signals. Control circuits in the base station and in the user terminal supply switching control signals relating to the transmitted information signals. Since highly integrated circuit interface modules are already available for ISDN standard bus systems, use of such a bus system significantly reduces the cost of the complete mobile radio system.

Abstract: A radiotelephone includes a speaker and at least one microphone, and is incorporated with the sun visor assembly of a vehicle. The speaker is included in the visor so as to radiate from the narrow side thereof which faces an occupant of the vehicle. The microphones are supported on an axially rotatable support rod which adjoins the opposite side of the sun visor and to which the sun visor is coupled so as to permit tilting thereof causing axial rotation of the support rod. The coupling is such that upward/downward tilting of the sun visor causes an opposite tilting of the main reception path between the microphones and the occupant of the vehicle, so that acoustic screening of the microphones by the sun visor cannot occur regardless of how the sun visor may be tilted.

Abstract: In order to provide brightness-dependent control of a lamp which is used for illuminating a LCD display, it is known to switch the lamp on and off in dependence on the measured brightness of the incident ambient light. To prevent overheating of the liquid crystal display when it is, for example, exposed to direct sunlight, the operating voltage for the lamp is changed in dependence on the measured brightness of the incident ambient light. A further improvement is accomplished when, additionally, in dependence on the ambient temperature measured, the operating voltage for the lamp changes, more specifically the operating voltage is switched off when a presettable threshold value is exceeded. The circuit arrangement for performing the method requires very little design effort and cost and is integrable to a very large degree.

Abstract: A closed frame is formed of a series of longitudinal pieces and a series of interlocking corner elements acting to hold the frame in assembled relation.

Abstract: Liquid crystal display units are finding increasing application in electrical appliances used for communications. If the appliance is for example a handset for a mobile radio transceiver and is held in a cradle on the dashboard, the angle of observation will change depending on whether the receiver is placed in the cradle or held in the hand. To ensure that the recognizability of the displayed information is not impaired upon a change in the position of the receiver, a control circuit automatically changes the contrast when such a change takes place. The circuitry required for this control is particularly simple when two different voltage values are generated by means of a switchable voltage-divider for two preset positions of the appliance. The switching takes place between the two voltage values in dependence upon the position of the cradle hook switch. The contrast (i.e.