151 / 2663 CIRCUIT DESCRIPTION
Art. No.: 80116-201
09 / 2004
stage is addressed. The output signals A and B thus serve in the selection of currently active transistors.
From the previously doubled frequency, the short start and stop pulses are produced for the respectively
active transistor.
The first part of the monoflop IC17 produces the start pulse, the second part the stop pulse.
The first part of the D-flipflop IC21 is additionally actuated by an ON_OFF signal for the safety circuits. In
this way, all start pulses can be suppressed on the one hand, while on the other, it is ensured that the
transistors can still be shut off in any case.
The arrangement of selection pulses for the individual transistors with the on/off pulses is made in the
NAND gate IC1 on the QK output stage.
Control board
Slot J3
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