. Electronic apparatus for biological research . Figure circuit is quiescent K4 conducts and V^ is cut off. Q, R^ and R^ form a compensated direct coupling and R^ and R^ are chosen such that cathode- follower grid and cathode are approximately at earth potential. Since i?i, corresponding to R in Figure , is returned to this line, V^ conducts but not too hard and the input resistance is high. Since the screen of Kg is connected to this line and the grid of V2 is returned via Kg^ to a yet more negative point at P, V^ is cut off". The magnitude of input pulse required to flip the
. Electronic apparatus for biological research . Figure circuit is quiescent K4 conducts and V^ is cut off. Q, R^ and R^ form a compensated direct coupling and R^ and R^ are chosen such that cathode- follower grid and cathode are approximately at earth potential. Since i?i, corresponding to R in Figure , is returned to this line, V^ conducts but not too hard and the input resistance is high. Since the screen of Kg is connected to this line and the grid of V2 is returned via Kg^ to a yet more negative point at P, V^ is cut off". The magnitude of input pulse required to flip the circuit is determined by the setting of P. On the arrival of a pulse of sufficient size, V^ is cut off and V2 is turned on, via the cathode-follower, both by a 100 V positive- going change applied to its screen and by the removal of the holding-off bias hitherto applied to the control grid via F3 4. The circuit remains flipped for a time determined by the time-constant R^C, and because R^ is 444
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Keywords: ., bookcentury1900, bookcollectionameri, bookcollectionbiodiversity
