VisualApplets
Operator Reference

Operator Library: Signal

The operator delays the input signal and provides it on its output. The delay is controlled by the control data input link PI.

The rising edge of a pulse at the input starts the delay. The delay time is equal to the last valid value at input link PI and is measured in ticks being high. The pulse width of the input pulse is kept, i.e. the rising and falling edges are delayed.

During delaying of a pulse no new pulses at the operator input can be accepted. In this case, every new input pulse will be ignored. Moreover, a change of the value at PI does not change the current pulse processing. PI is sampled at the start of the delay.

The operator can be reseted using input link Reset. While the reset input is high, no output pulses are processed. Any processing is aborted. The operator restarts operation when the reset input is low. The following waveform illustrates the operator's behavior.

The Tick input defines the time, the operator is processing data. It can be used like a prescaler. In most cases, the Tick input is not required. Tie it to operator VCC in this case. In the following figure, the influence of the Tick input is shown.

One special case when using ticks is that input pulses are sampled even if no tick is present. This is shown for the second input pulse of the waveform. This ensures that no input pulses can get lost.

This operator is excluded from the VisualApplets functional simulation.