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Additional resources for Analog and Mixed-Signal Modeling Using the VHDL-AMS Language [Presentation Slides, 36 Design Conference]

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Q’Delayed(T) • Quantity Q delayed by T (ideal delay, T >= 0) @8u…v†‡rÃF7hxhyh…Ã6H9rr’Ã@H‚†r…  968((ÃWC9G6HTÃUˆ‡‚…vhy VHDL AMS Implicit Quantities (2) ♦ Q’Ltf(num, den) • Laplace transfer function whose input is Q ♦ Q’ZOH(T, initial_delay) • A sampled version of quantity Q (zero-order hold) ♦ Q’Ztf(num, den, T, initial_delay) • Z-domain transfer function whose input is Q ♦ S’Ramp(tr, tf) • A quantity that follows signal S, but with specified rise and fall times. t. time is limited by the specified slopes.

0 ♦ Initial conditions replace implicit equations while finding an analog solution point. t. time is limited by the specified slopes. Default for max_falling_slope is max_rising_slope, default for max_rising_slope is infinity. ♦ Q’Delayed(T) • Quantity Q delayed by T (ideal delay, T >= 0) @8u…v†‡rÃF7hxhyh…Ã6H9rr’Ã@H‚†r…  968((ÃWC9G6HTÃUˆ‡‚…vhy VHDL AMS Implicit Quantities (2) ♦ Q’Ltf(num, den) • Laplace transfer function whose input is Q ♦ Q’ZOH(T, initial_delay) • A sampled version of quantity Q (zero-order hold) ♦ Q’Ztf(num, den, T, initial_delay) • Z-domain transfer function whose input is Q ♦ S’Ramp(tr, tf) • A quantity that follows signal S, but with specified rise and fall times.

YKL dout = ’1’ YLQ  YKL YLQ ! YKL unstable WLPHRXW YLQ  YOR dout = ’X’ YLQ !

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