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公开(公告)号：US20250147078A1
公开(公告)日：2025-05-08
申请号：US18590241
申请日：2024-02-28
Inventor： Hemant SHUKLA , Sven SOELL , Paul WILSON , Deep SAXENA , Beata K. KUBIAK , Ross C. MORGAN , Malcolm BLYTH , Angus BLACK
Abstract: A current sensing system for sensing current through first and second circuit elements of a circuit in which the first and second circuit elements are active in respective first and second phases of an operational cycle of the circuit, the current sensing system comprising: first current sensing circuitry for sensing a current through the first circuit element; second current sensing circuitry for sensing a current through the second circuit element; and summation circuitry coupled to an output of the first current sensing circuitry and an output of the second current sensing circuitry, wherein the summation circuitry is configured to output a summation signal indicative of a sum of the sensed current through the first circuit element and the sensed current through the second circuit element so as to provide an indication of a total current drawn over an operational cycle of the circuit.
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公开(公告)号：US20220368325A1
公开(公告)日：2022-11-17
申请号：US17874357
申请日：2022-07-27
Inventor： Axel THOMSEN , Eric J. KING , Thomas H. HOFF , John L. MELANSON , Angus BLACK , Ross C. MORGAN , Malcolm BLYTH
IPC: H03K17/687 , H02N2/00 , H02M3/158
Abstract: This application relates to methods and apparatus for driving a transducer with switching drivers. A switching driver has first and second supply node for receiving supply voltages and includes an output bridge stage, a capacitor and a network of switches. The network of switches is operable in different switch states to provide different switching voltages to the output bridge stage. A controller is configured to control the switch state of the network of switches and a duty cycle of output switches of the output bridge stage based on an input signal to generate an output signal for driving the transducer.
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