11.3 BIDIRECTIONAL SAMPLING GATES

Till now we have considered gates that pass only unidirectional signals. Bidirectional sampling gates transmit both positive and negative signals. These gates can be derived using diodes, BJTs, FETs, etc. We are going to consider some variations of the bidirectional gates.

FIGURE 11.10 The unidirectional diode gate to transmit negative pulses

FIGURE 11.10 The unidirectional diode gate to transmit negative pulses

11.3.1 Single-transistor Bidirectional Sampling Gates

A bidirectional sampling gate using a single transistor is shown in Fig. 11.11. The control signal and the input are applied to the base of Q. The control signal is a pulse whose amplitude varies between V1 and V2 and ...

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