Method and device for electric supply in a mobile apparatus
AssigneeAlcatel
InventorsVincent Lomba, Christophe Rouverand
Life of this patent
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Abstract
To solve a problem due to a transient regulation phenomenon (6) at the time of an increase in power demand (1) in a mobile telephone, the regulator is pre-compensated (7) at a time (T′) in advance of a predicted time (T) of the increase in electrical power demand in the mobile telephone. As a result, a power supply voltage (Vr) crossing an operating threshold (3) outside a period of use has no harmful effect on the operation of the mobile appliance.
Claims9
A method of supplying electrical power to a digital processor (9) in a mobile appliance (8), in which method:
- a supply voltage (Vr) of the processor is measured (13),
- said supply voltage is compared (14) to a reference (V0), and
- a control circuit supplying said supply voltage is regulated (11) depending on the offset between said supply voltage and said reference,
- the method being characterised in that:
- a predictable time (T) of an increase in electrical power demand is temporally identified, and
- the mode of operation of the control circuit is modified (OT′) in advance at a time (T′).
A method of supplying electrical power to a digital processor (9) in a mobile appliance (8), in which method:
- a supply voltage (Vr) of the processor is measured (13),
- said supply voltage is compared (14) to a reference (V0), and
- a control circuit supplying said supply voltage is regulated (11) depending on the offset between said supply voltage and said reference,
- the method being characterized in that:
- a predictable time (T) of an increase in electrical power demand is identified,
- the mode of operation of the control circuit is modified (OT′) in advance at a time (T′),
- the processor is divided into a plurality of separate circuits (9, 20, 21) supplied with power individually,
- a predictable time of an increase in the electrical power demand of a separate circuit is identified, and
- the mode of operation of a control circuit (10, 22, 23) dedicated to said separate circuit is modified ahead of time.
A mobile appliance provided with a digital processor (9) and a system (10) for supplying electrical power to said digital processor, said electrical power supply system including a control circuit for slaving a power supply voltage (Vr) of said processor to a reference value (V0), the appliance being characterized in that it includes a predictor (18) for predicting a time (T) of an increase in the power consumption of the processor and means for modifying (OT′) the mode of operation of the control circuit in advance at a time (T′), and that the predictor includes a sequencer or state machine and a clock (19) for activating said sequencer or state machine.
A mobile appliance provided with a digital processor (9) and a system (10) for supplying electrical power to said digital processor, said electrical power supply system including a control circuit for slaving a power supply voltage (Vr) of said processor to a reference value (V0), the appliance being characterized in that it includes a predictor (18) for predicting a time (T) of an increase in the power consumption of the processor and means for modifying (OT′) the mode of operation of the control circuit in advance at a time (T′), and
- in that the modifying means include a reference signal generator (15) connected to a set point input of the control circuit and having a control input so that it can be controlled by the predictor.
A mobile appliance provided with a digital processor (9) and a system (10) for supplying electrical power to said digital processor, said electrical power supply system including a control circuit for slaving a power supply voltage (Vr) of said processor to a reference value (V0), the appliance being characterized in that it includes a predictor (18) for predicting a time (T) of an increase in the power consumption of the processor and means for modifying (OT′) the mode of operation of the control circuit in advance at a time (T′), and
- in that the control circuit includes a plurality of regulators (9, 20, 21) dedicated to different processors (10, 22, 23).
A mobile appliance provided with a digital processor (9) and a system (10) for supplying electrical power to said digital processor, said electrical power supply system including a control circuit for slaving a power supply voltage (Vr) of said processor to a reference value (V0), the appliance being characterized in that it includes a predictor (18) for predicting a time (T) of an increase in the power consumption of the processor and means for modifying (OT′) the mode of operation of the control circuit in advance at a time (T′), and
- in that the control circuit includes an output capacitor with a capacitance of the order of 10 μF.
A method of supplying electrical power to a digital processor (9) in a mobile appliance (8), in which method:
- a supply voltage (Vr) of the processor is measured (13),
- said supply voltage is compared (14) to a reference (V0), and
- a control circuit supplying said supply voltage is regulated (11) depending on the offset between said supply voltage and said reference,
- the method being characterized in that:
- a predictable time (T) of an increase in electrical power demand is identified,
- the mode of operation of the control circuit is modified (OT′) in advance at a time (T′),
- wherein the mobile appliance is a mobile telephone in a TDMA mobile telephone system employing a plurality of frames each having a first time slot of known duration, and
- wherein said predictable time (T) is at the beginning of said first time slot.
Dependencies are inferred from the claim text.