Methods and Systems for Current Sensing
AssigneeDialog Semiconductor (UK) Limited
InventorGuillaume de Cremoux
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Abstract
A system comprising a current sensor for sensing an average output current and/or an average input current of a circuit is presented. There is a first switch, the first switch being arranged to selectively couple a sensing node of the circuit to a first voltage, wherein the current sensor comprises a pulse density modulator configured to generate a pulse density modulated signal. The pulse density modulated signal is dependent on an average current flowing through the first switch. The current sensor is configured to sense the average output current and/or the average input current of the circuit using the pulse density modulated signal.
Claims25
A system comprising a current sensor for sensing an average output current and/or an average input current of a circuit comprising a first switch, the first switch being arranged to selectively couple a sensing node of the circuit to a first voltage, wherein
- the current sensor comprises a pulse density modulator configured to generate a pulse density modulated signal, the pulse density modulated signal being dependent on an average current flowing through the first switch;
- and
- the current sensor is configured to sense the average output current and/or the average input current of the circuit using the pulse density modulated signal.
A method for sensing an average output current and/or an average input current of a circuit comprising a first switch, the first switch being arranged to selectively couple a sensing node of the circuit to a first voltage, the method comprising
- providing a current sensor comprising a pulse density modulator;
- generating via the pulse density modulator a pulse density modulated signal, wherein the pulse density modulated signal is dependent on an average current flowing through the first switch;
- and
- sensing the average output current and/or the average input current of the circuit using the pulse density modulated signal.
Dependencies are inferred from the claim text.