32,948
edits
S-53: Difference between revisions
Jump to navigation
Jump to search
no edit summary
No edit summary |
No edit summary |
||
| Line 7: | Line 7: | ||
an adjustable trigger offset voltage and trigger polarity selection. Switching diodes CR6 and CR8 are | an adjustable trigger offset voltage and trigger polarity selection. Switching diodes CR6 and CR8 are | ||
used for selecting the trigger polarity. The differential amplifier (i.e., phase splitter) generates | used for selecting the trigger polarity. The differential amplifier (i.e., phase splitter) generates | ||
both phases, inverted and noninverted. Depending on the position of the trigger polarity switch one | both phases, inverted and noninverted. Depending on the position of the trigger polarity switch, one | ||
or the other of the phases is shunted by 200 ohm resistor. The two signals are buffered by common-base | or the other of the phases is shunted by 200 ohm resistor. The two signals are buffered by common-base | ||
amplifiers Q20 and Q22, whose collector currents are summed. R25 sets up a bias current on trigger | amplifiers Q20 and Q22, whose collector currents are summed. R25 sets up a bias current on trigger | ||