Abstract: A circuit for biasing a gallium arsenide (GaAs) power amplifier includes a reference voltage generator circuit implemented in a gallium arsenide (GaAs) material system, a field effect transistor (FET) bias circuit implemented in the gallium arsenide material system and adapted to receive an output of the reference voltage generator circuit and adapted to provide an output to a radio frequency (RF) amplifier stage.

Abstract: A circuit for biasing a gallium arsenide (GaAs) power amplifier includes a reference voltage generator circuit implemented in a gallium arsenide (GaAs) material system, a field effect transistor (FET) bias circuit implemented in the gallium arsenide material system and adapted to receive an output of the reference voltage generator circuit and adapted to provide an output to a radio frequency (RF) amplifier stage.

Abstract: An electronic card includes a digital processor, an electrochemical battery and a communications port. The processor and battery are essentially coplanar, and are sandwiched between and enclosed by two flexible covers, preferably made from an insulating plastic material, and preferably fitted to the components that they enclose. The communications port can include, for example, a Smart Card contact port, a stripe emulator, an RF port, and IR port, etc. The battery may comprise a rechargeable battery. In an exemplary embodiment, at least the processor is carried by a flexible printed circuit (PC) board. In other exemplary embodiments, switches and/or indicators are also carried by the PC board. A method for manufacturing an electronic card having at least two components is also disclosed.

Abstract: In an exemplary embodiment a companion processor system is provided which pairs a secure processor with a general processor. The secure processor can, for example, include a signal port, a power port and a ground port. The general processor is, in for example, operative to power up the secure processor by applying, directly or indirectly, at least one of power and ground to the power port and ground port, respectively of the secure processor when it wishes to communicate with the secure processor via the signal port. In another exemplary embodiment a method for providing secure transactions is disclosed includes: detecting an input with a general processor of the initiation of a desired transaction; powering up a secure processor under the direction of the general processor; and communicating between the general processor and the secure processor to provide at least one secure transaction.

Abstract: A circuit for biasing a gallium arsenide (GaAs) power amplifier includes a reference voltage generator circuit implemented in a gallium arsenide (GaAs) material system, a field effect transistor (FET) bias circuit implemented in the gallium arsenide material system and adapted to receive an output of the reference voltage generator circuit and adapted to provide an output to a radio frequency (RF) amplifier stage.

Abstract: An electronic card includes a digital processor, an electrochemical battery and a communications port. The processor and battery are essentially coplanar, and are sandwiched between and enclosed by two flexible covers, preferably made from an insulating plastic material, and preferably fitted to the components that they enclose. The communications port can include, for example, a Smart Card contact port, a stripe emulator, an RF port, and IR port, etc. The battery may comprise a rechargeable battery. In an exemplary embodiment, at least the processor is carried by a flexible printed circuit (PC) board. In other exemplary embodiments, switches and/or indicators are also carried by the PC board. A method for manufacturing an electronic card having at least two components is also disclosed.