| 摘要 |
The present circuit for driving by the PWM procedure a bridge circuit BR of the type having a signal input I1,I2 and a signal output O1-O2 and at least two conduction control signals C1 and C2 comprises a first virtually-square-wave generator CO1 having an output coupled to one of the two control inputs and a second virtually-square-wave generator CO2 having an output coupled to the other of the two control inputs. In this manner, the bridge being driven by two square waves, the null value of the current at the output O1-O2 no longer constitutes an intrinsic discontinuity and any value, even around zero, is controllable with relative ease. <IMAGE>
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