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The circuit driver illustrated in Fig. 1 is a push-pull driver with automatic bidirectional feedback when the tristate input T is activated.
English (United States)
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Bidirectional Tristate Driver
The circuit driver illustrated in Fig. 1 is a push-pull driver with automatic
bidirectional feedback when the tristate input T is activated.
When input T is 0, the output F is A. However, when T=1, if F=1, the
conduction of TT and TFB keeps T2, T3 and T4 in the high impedance mode of
operation, and A=1. When F=O, these transistors (T2, T3 and T4) are held off by
the conduction of TT and TB. Note that A=O. This bidirectional feedback is
illustrated in Fig. 2.
To activate the "bidirectional mode of operation," the circuit that drives (A)
must be UP when T=1. This driver circuit may be used for any T/2/L application.
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