Sagem Sa

Apple Inc.

Sagem Mobiles

Fernando Romao

Robert Bernard

Marc Recouly

Karim Ramsi

Patrick Le Fichous

To enable a use of a two-band type mobile telephone with a dual radiation circuit, a selector switch is placed between this dual radiation circuit and transmission channels in each of these bands. Given the emergence of the second harmonic resulting from the presence of the selector switch, the undesirable components are filtered with a filter. A part of the reactive components of this filter is between the radiating circuit and the selector switch, while the other part is in the channel to be filtered. Depending on the nature of the channel, the other part in the channel to be filtered has different values.

Two-band transmitter-receiver with dual radiation device

An RC type oscillator ( ) is integrated into a processor circuit ( ) of a mobile device ( ). This oscillator is used to set the pace of the activity of the processor circuit during periods when the mobile device is on standby. The frequency drift due to the temperature variations of the oscillator is concerted by a regular calibration of the oscillator by a faster oscillator recognized to be stable. This embodiment gives gain in space and a reduction in cost.

Mobile device and method for the management of a standby mode in a mobile device of this kind

Method for controlling a battery recharging and implementing device

The leakage current in a circuit for charging a battery is eliminated by placing a switch in series with the resistor connecting the emitter and the base of a transistor. When this switch is open the current can no longer flow through and there is therefore no longer any leakage current. This switch is controlled by a microprocessor through a bus and the battery can be charged in pulsed mode. Furthermore, the circuit has no protection diode against reverse voltage and over voltage.

Mobile telephone comprising an improved battery charger circuit

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Montesson, France

Fernando Romao