SWITCHING CIRCUIT AND CURRENT COMPENSATING METHOD THEREIN

摘要

A switching circuit includes a normally-on switch, a normally-off switch, a current compensating unit and a current sharing unit. Each of the normally-on switch and the normally-off switch include a first terminal, a second terminal and a control terminal respectively. The first terminal of the normally-off switch is connected to the second terminal of the normally-on switch. The second terminal of the normally-off switch is connected to the control terminal of the normally-on switch. The current compensating unit is connected to the normally-on switch and configured to generate a compensating current when a leakage current of the normally-on switch is smaller than the leakage current of the normally-off switch. The current sharing unit is connected to the normally-off switch and configured to share the leakage current of the normally-on switch when the leakage current of the normally-on switch is larger than the leakage current of the normally-off switch.

主权项

1. A switching circuit, comprising:
a normally-on switching unit comprising a first terminal, a second terminal and a control terminal; a normally-off switching unit comprising:
a first terminal electrically connected to the second terminal of the normally-on switching unit;a second terminal electrically connected to the control terminal of the normally-on switching unit; anda control terminal; a current compensating unit electrically connected between the first terminal of the normally-on switching unit and the second terminal of the normally-on switching unit, and configured to generate a compensating current flow to the normally-off switching unit when the leakage current of the normally-on switching unit is smaller than the leakage current of the normally-off switching unit; and a current sharing unit electrically connected between the first terminal of the normally-off switching unit and the second terminal of the normally-off switching unit, and configured to share the leakage current of the normally-on switching unit when the leakage current of the normally-on switching unit is larger than the leakage current of the normally-off switching unit.