Patent ID: 6166869
Filing Date: 2000-12-26
Classification: G11B,H03K

Abstract:
An H-bridge circuit including first and second pairs of switching devices to selectively couple an inductive electrical load between first and second voltage supply lines, said H-bridge circuit comprising:a boost capacitor coupled between the first voltage supply line and a switching terminal of each of said second pair of switching devices, said boost capacitor having a capacitance substantially equivalent to an input capacitance of an associated one of said second pair of switching devices;an additional switching device having a control terminal and first and second current carrying terminals thereof, said control terminal being coupled to said first current carrying terminal;a current source coupled in series with said first and second current carrying terminals of said additional switching device between said first and second voltage supply lines; andan electrical connection between the control terminal of the additional switching device and the switching terminal of the associated one of said second pair of switching devices.