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Unformatted text preview: called output enable. When
this input is asserted the device behaves
like a normal gate, otherwise, the output
behaves like anC' A circuit.
Hi-Z TriState Devices TriState Devices One application of tri-state devices is to be used
to connect several devices to a single bus. When
changing which output is connected to bus one
must ensure that all outputs must first go into the
hi-Z state thus avoiding the possibility that two
outputs would be connected to the bus
simultaneously. Schmitt Trigger Gates Used for wave-shaping purposes. Level sensitive with output switching state at two
distinct trigger levels, called lower trigger level –
VT- and upper trigger level – VT+ . The difference
between the two trigger levels is called hysteresis
( VT+ - VT- ). Shown below is the input-output transfer
characteristic. Schmitt Trigger Gates Transforming an analog input signal into a
clean square form signal....
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- Spring '11