Narrow Pulse Driving Circuit

Published:2011/8/17 5:21:00 Author: | Keyword: Narrow, Pulse, Driving | From:SeekIC

The picture shows the circuit which could add enough reverse bias even for the narrow pulse. In the circuit shown in picture (a), when the VT1 is conducted, the current would be through R and VT3's base electrode. At the same time it would charge the capacitor C which is regarded as reverse bias power. If the VT1 is not conducted, the diode VD2 would make the VT2 conducted, the capacitor C's energy would be reversely added on the VD2's base electrode. If the carriers in VT2 are completely swept and over, it would reversely add the NSI's voltage on the VT3's base electrode through R2. For the circuit shown in picture (b), the reverse bias power C's voltage is also get from R2. The working principle is just the same with picture (a).



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