Patent ID: 11860199
Assignee: DIALOG SEMICONDUCTOR (UK) LIMITED
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 14:
15. A method of current sensing an inductor current of a switching converter comprising an inductor and a first switch, the first switch being arranged to selectively couple the inductor to a first voltage, the method comprising:
i) generating a first output current that is dependent on the inductor current flowing through the inductor using a first current sensor; and
ii) compensating, at least partially, for an error arising due to the first switch in the generation of the first output current using the first current sensor, wherein:
the first current sensor comprises a first stage configured to generate a first current that is dependent on the inductor current, the first current comprising a current error, the current error resulting from the error arising due to the first switch; and
a second stage configured to:
i) receive the first current; and
ii) generate the first output current by at least partially compensating for the current error of the first current and wherein the first comprises:

a first differential amplifier;
a first resistive element;
a second resistive element configured to be couplable to the first switch in a parallel coupling configuration, wherein:
the first differential amplifier is configured to generate the first current that is dependent on the impedances of the first resistive element, the second resistive element and the first switch, wherein:

an output of the first differential amplifier is coupled to a gate of a first transistor a negative input of the first differential amplifier is coupled to a first terminal of the first transistor.