Analog Switch Problem Help

[syee10]

Hi all,

I have a problem with an analog switch DG201 in my analog design circuit. The circuit has 2 input at the early stage, v(t) and i(t). v(t) will be changed into TTL square wave and go through a sample and hold circuit. And the i(t) will be go through the sample and hold circuit as well. The waveform is shown in Figure where waveform A is the v(t) TTL square wave coming out from the opamp. Waveform B is the output of the sample and hold circuit for v(t).
Now my problem is how am i going to obtain the waveform C and D by using the analog switch DG201? I am using labcenter proteus and there is no simulator model of DG201 in my simulation software. Is there any other switch/device can help me to obtain waveform C and D? Help me please. Thanks..

[dlgoff]

I am using labcenter proteus and there is no simulator model of DG201 in my simulation software.
Does your simulator have the CD4016 Quad Bilateral Switch?

http://www.fairchildsemi.com/ds/CD/CD4016BC.pdf

[syee10]

Yes i have it.. can you briefly explain to me how am i going to connect this Quad Bilateral Switch?

[dlgoff]

You need a control signal (Vc) to make the connection between input and output. You'll need to look at the timing diagrams in the data sheet to see if it will be fast enough for your application.

[syee10]

Hi..i have read through the datasheet of CD4016.. but i still dun understand it well @@
Based on my understanding, i need to perform a propagation delay time control to signal output which is in the Figure 1,2 or 3. Am i right?