TTL level / ± l2V level conversion circuit

Published:2011/7/6 4:59:00 Author:Lucas | Keyword: TTL level, ± l2V level , conversion circuit | From:SeekIC

In the circuit, VTl is the switch circuit, of which base is grounded circuit. When 74LSO4 output is in high level, VTl is conducted, and its collector current changes into the base current of VT2, VT1 is also conducted, and the level with the output in U is changed into l2V to add with the collector saturation voltage of VT2. This circuit can not make high-speed switching work. If Rl is connected to capacitor Cl with capacity in several hundred pF in parallel, and the base - collector of VT2 is connected with the Schottky diode VD1, VT2 is conducted and not in the completely saturated state, so to some extent, it will increase the switching frequency.



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