| US 7,531,993 B2 | ||
| Half bridge circuit and method of operating a half bridge circuit | ||
| Florin Udrea, Cambridge (United Kingdom); Nishad Udugampola, Cambridge (United Kingdom); and Gehan A. J. Amaratunga, Cambridge (United Kingdom) | ||
| Assigned to Cambridge Semiconductor Limited, Cambridge (United Kingdom) | ||
| Filed on Aug. 29, 2007, as Appl. No. 11/847,234. | ||
| Prior Publication US 2009/0058498 A1, Mar. 05, 2009 | ||
| Int. Cl. G05F 3/16 (2006.01); H03K 3/35 (2006.01) | ||
| U.S. Cl. 323—224 [327/429] | 16 Claims |
| 1. A half bridge circuit, the circuit comprising:
a first semiconductor switch having at least one control gate;
a second semiconductor switch having at least two control gates;
a first driver having an output connected to a control gate of the first semiconductor switch for selectively applying a first
control voltage to the control gate of the first semiconductor switch; and,
a second driver having an output connected to a first control gate of the second semiconductor switch for selectively applying
a second control voltage to said first control gate of the second semiconductor switch;
the output of the first driver being connected to a second control gate of the second semiconductor switch by a circuit arrangement
such that when the first driver is operated to apply a high, positive voltage to the control gate of the first semiconductor
switch, a positive voltage is applied to said second control gate of the second semiconductor switch, and such that when the
first driver is operated to apply a low, zero or small voltage to the control gate of the first semiconductor switch, a negative
voltage is applied to said second control gate of the second semiconductor switch.
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