Patent ID: 6605976
Filing Date: 2003-08-12
Classification: H02M,H03K

Abstract:
A half-bridge circuit, comprising:an upper transistor (T2) having a source connected to an output terminal (120), and a drain connected to a rail (130) for application of a high direct voltage; a lower transistor (T1) having a source connected to a rail (140) for application of a low direct voltage, and a drain connected to the output terminal (120); an upper transistor control circuit (HS) for driving the upper transistor (T2) by applying a signal to a control terminal of the upper transistor (T1); and a lower transistor control circuit (110) for driving the lower transistor (T1) by applying a signal to a control terminal of the lower transistor (T1), the lower transistor control circuit (110) comprising: a third transistor (T3) having a drain connected to the output terminal (120), and a source connected to an anode of a diode (D1), a cathode of the diode (D1) being connected to the control terminal of the lower transistor (T1); and a fourth transistor (T4) having a drain connected to the control terminal of the lower transistor (T1), and a source connected to the rail (140) for application of a low direct voltage.