Integrated circuit able to operate in active and inactive modes and a device including it

1. An integrated circuit for a portable electronic device able to operate in an active mode or in an inactive mode and including a functional module implementing control functions of said device in said active mode and said inactive mode, controlling switching of said device to said active mode and including its own power supply unit, independent of power supply arrangements of the circuit in which it is integrated, which includes one or more electronic switches responsive to a control signal for electrically isolating said module and its own power supply unit from the remainder of said integrated circuit in said inactive mode.

2. An integrated circuit for a portable electronic device able to operate in an active mode or in an inactive mode and including a functional module implementing control functions of said device in said active mode and said inactive mode, controlling switching of said device to said active mode and including its own power supply unit, independent of power supply arrangements of the circuit in which it is integrated, which includes one or more devices for electrically isolating said module and its own power supply unit from the remainder of said integrated circuit;

wherein said power supply arrangements comprise a separate power supply unit connected to said integrated circuit, and

wherein said power supply unit of said module has a dedicated positive patch or terminal and a dedicated negative patch or terminal connected to corresponding power supply buses.

3. The integrated circuit claimed in claim 2 , wherein said electrical isolation is provided by an electronic switch or electronic switches.

4. The integrated circuit claimed in claim 3 , in the form of a digital baseband dedicated circuit.

5. The integrated circuit claimed in claim 4 wherein said functional module corresponds to a module integrating a low-frequency clock.

6. A portable or mobile radio communication device, such as a GSM and/or UMTS cellular telephone, able to operate in an active mode or in an inactive mode and including an integrated circuit including a functional module implementing control functions of said device in said active mode and said inactive mode, controlling switching of said device to said active mode and including its own power supply unit, independent of power supply arrangements of the circuit in which it is integrated, which includes one or more electronic switches responsive to a control signal for electrically isolating said module and its own power supply unit from the remainder of said integrated circuit in said inactive mode.

7. A portable or mobile radio communication device, such as a GSM and/or UMTS cellular telephone, able to operate in an active mode or in an inactive mode and including an integrated circuit including a functional module implementing control functions of said device in said active mode and said inactive mode, controlling switching of said device to said active mode and including its own power supply unit, independent of power supply arrangements of the circuit in which it is integrated, which includes one or more devices for electrically isolating said module and its own power supply unit from the remainder of said integrated circuit,

wherein said power supply arrangements comprise a separate power supply unit connected to said integrated circuit, and

wherein said power supply unit of said module has a dedicated positive patch or terminal and a dedicated negative patch or terminal connected to corresponding power supply buses.

8. The portable or mobile radio communication device claimed in claim 7 , wherein said electrical isolation is provided by an electronic switch or electronic switches.

9. The portable or mobile radio communication device claimed in claim 8 , in which said integrated circuit is in the form of a digital baseband dedicated circuit.

10. The integrated circuit claimed in claim 9 wherein said functional module corresponds to a module integrating a low-frequency clock.

11. An integrated circuit for a portable electronic device able to operate in an active mode or in an inactive mode and including a functional module implementing control functions of said device in said active mode and said inactive mode, controlling switching of said device to said active mode and including its own power supply unit, independent of power supply arrangements of the circuit in which it is integrated, which includes one or more devices for electrically isolating said module and its own power supply unit from the remainder of said integrated circuit,

wherein said power supply arrangements comprise a separate power supply unit ( 5 ′, 5 ) connected to the integrated circuit ( 1 ).

12. A portable or mobile radio communication device, such as a GSM and/or UMTS cellular telephone, able to operate in an active mode or in an inactive mode and including an integrated circuit including a functional module implementing control functions of said device in said active mode and said inactive mode, controlling switching of said device to said active mode and including its own power supply unit, independent of power supply arrangements of the circuit in which it is integrated, which includes one or more devices for electrically isolating said module and its own power supply unit from the remainder of said integrated circuit,

wherein said power supply arrangements comprise a separate power supply unit ( 5 ′, 5 ) connected to the integrated circuit ( 1 ).