Power level indicator

1. An electronic device adapted to generate a supply voltage at an input node from a radio frequency (RF) signal, the electronic device comprising a voltage limiter coupled to the input node for limiting a supply voltage level at the input node that is generated by the received RF signal, wherein the limiter is configured to draw a limiter current from the input node so as to limit the supply voltage level to a maximum and a magnitude of the limiter current is used for controlling a power consumption of the electronic device, wherein the limiter comprises a first transistor coupled with a channel to the input node and the first transistor is controlled to draw the limiter current from the input node and a second transistor coupled to the first transistor in a current mirror configuration for mirroring the limiter current, further comprising a voltage regulator having a third transistor for regulating voltage to the electronic device and a fourth transistor in series with the second transistor coupled to an input for the voltage regulator and having a control electrode coupled to the control electrode of the third transistor, a voltage at a node between the second and fourth transistors being used to control power consumption of the electronic device.

2. The electronic device according to claim 1 , being further configured to determine an amount of excess power that is available to the electronic device, based on the magnitude of the limiter current.

3. The electronic device according to claim 1 , being configured to control the power consumption based on the magnitude of the limiter current and a power consumption in the electronic device.

4. The electronic device according to claim 3 , further comprising a buffer for buffering energy to be used for supplying the electronic device, wherein the electronic device is further configured to control the power consumption based on a combination of the limiter current and energy stored on the buffer.

5. The electronic device according to claim 4 , being configured to vary the clock frequency of a clock signal so as to control the power consumption.

6. A method of operating an electronic device, the method comprising: determining a magnitude of a voltage limiter current that is used to limit a voltage level at an input node, which is generated with a received RF signal, mirroring the magnitude of the limiter current, passing the mirrored current through a transistor which has a control electrode coupled to a control electrode of a voltage regulator circuit for regulating voltage to the electronic device, utilizing a signal had a node between the current mirror in the transistor for generating a signal for controlling a power consumption of the electronic device based on mirrored magnitude of the limiter current by varying the clock frequency of a clock signal so as to control the power consumption.

7. The method according to claim 6 , further comprising determining an amount of excess power that is available to the electronic device, based on the magnitude of the limiter current.

8. The method according to claim 6 , further comprising controlling the power consumption based on the magnitude of the limiter current and a power consumption in the electronic device.

9. The method according to claim 6 , further comprising buffering energy to be used for supplying the electronic device, wherein the electronic device controls the power consumption based on a combination of the limiter current and energy stored on the buffer.