Re: Ping Tester/ Complementary emitter-follower

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Antonio Carlos M. de Queiroz by way of Terry Fritz <twftesla-at-qwest-dot-net>" <acmq-at-compuland-dot-com.br>

Tesla list wrote:
 >
 > Original poster: "Jolyon Vater Cox by way of Terry Fritz 
<twftesla-at-qwest-dot-net>" <jolyon-at-vatercox.freeserve.co.uk>
 >
 > Other than because of the 0.6 volt base-emitter voltage drop what are the
 > reasons if any why a complementary emitter-follower outout stage cannot be
 > used in a "ping tester" for Tesla coils?

When the current changes direction, +/- 1.2 V steps appear at the output
of the buffer, distorting all the waveforms. Works reasonably if the
step voltages are much larger than this. Or you can add bias to the
transistors and/or make a more complex buffer with negative feedback
to keep the output voltage constant.

Antonio Carlos M. de Queiroz