公开(公告)号：US20180372552A1

公开(公告)日：2018-12-27

申请号：US16015890

申请日：2018-06-22

Applicant: Nidec Control Techniques Limited

Inventor： Dilesh Arvind RAUT

IPC: G01K7/01 ,  H03K17/567

Abstract: A method performed in a circuit is provided. The circuit comprises a semiconductor switch having first, second and third terminals and being arranged such that a signal applied at the first terminal controls a current between the second and third terminals. The circuit further comprises monitoring circuitry comprising a first diode and charge determining circuitry, the third terminal of the semiconductor switch being connected to the monitoring circuitry and to supply circuitry. The method comprises determining, by the charge determining circuitry, an indication of an amount of electrical charge that has, consequent to a switching event at the semiconductor switch, flown through the first diode under reverse recovery conditions.