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Generate 100V, 10A, 4µs pulses with half bridge drivers

Posted: 22 May 2009     Print Version  Bookmark and Share

Keywords:DSL driver  protection circuitry  telephone line 

Lightning causes a large current spike when it strikes a telephone line. The output of a DSL driver could be destroyed by this surge current. To ensure robust operation, protection circuitry is used, and the output of the driver needs to be tested to the "worst case" standard of 4kV.

However, communication companies commonly use primary and secondary sets of protection circuitry so the actual assault on the line driver is reduced. DSL drivers must be tested to quantify what the output can withstand without failure.

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