![]() In others, and most of what I do, a PWL step with gaussian roll off applied to the edges is all that is necessary. In some cases a low pass filter is used to bandwidth limit the step function. Clocks can be made almost anything but the edges are often ignored/over looked and are often much faster than needed.ĭepending on what the simulation is for determines what has to done. That defines the bandwidth that the system will experience. ehhh, not the same! I like to find out the actual device that is used. ![]() People fall back to data rate in the channel. This is the $64K question in my business. Is Vxxx n+ n- PULSE ( 0.0V 3.3V 0.0 1ns 1ns 4.999us 10us ) 100KHZ squarewave?Īs an SI/EMC guy, this depends on the edge rate. The 1ns rise time requires less than 400MHz bandwidth. John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK See They took me to a specialist burns unit - and made me learn 'To a haggis'. Vxxx n+ n- PULSE (-3.3V 3.3V 0.0 1ns 1ns 4.999us 10us )Īlter accordingly for different voltages or different rise/fall times,īut don't use a rise or fall time of 0.1ns rise and fall times imply a bandwidth of 5GHz or so. How can i create ac square wave with 100KHz.Vxxx n+ n- PULSE ( 0.0V 3.3V 0.0 1ns 1ns 4.999us 10us )That isn't an AC square wave, because it is nowhere negative.
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