TTL Bypass Capacitor

[spartico]

Hi there , thanks for your answer. I am designing a TTL Logic circuit with Multisim + Ultiboard. For noise problems , I need to place bypass capacitors to each Vcc and GND pins for each IC but since those pins are hidden in Multisim , I don't know how ?

[Tayyab_R]

Hi spartico,

Take a look in the attached file. This is how I would implement it. Basically, you will need to define a seperate voltage and ground connector for each of the gates. Please open the gates and take a look at how the hidden pins are assigned.

Hope this helps.

[spartico]

I have Multisim 11.0 loaded so ms12 files cannot be opened. May you reupload it as ms11 please if it won't be trouble. Thanks for your answer and interest. And by the way , If i put different Vcc and DGND for each IC on Multisim , when I transfer it to Ultiboard will it's PCB layout have different Vcc holes or only one common ?

[Tayyab_R · Accepted solution]

Attached is the file in v11.

VCC and Ground are virtual components meaning by themself, they do not get transferred to the PCB. What is usually done is that you place a connector and connect VCC and GND to this connector. This connector will then allow you to make the required connections to VCC and GND on your physical PCB. In the Multisim database, there is a Group called Connectors which has an extensive selection of connectors which you can choose from.

Hope this helps.

[spartico]

I am most grateful. I was afraid to ask my advisor professor about these since they are extremely fundamental things. Yet I have successfully designed a non-restoring square root algorithm circuit with logic ics but cannot connect bypass capacitors 😄

[iweeettt]

Hello Tayyab_R,

I am looking at your file attached, does this configuration mean there are two series capacitors between the supple and gnd pins for each component?

Thank you in advance

[jaattvishal]

Thank you so much