TTL bypass capacitor
Hi, thanks for your response. I am a logic circuit TTL with Multisim and Ultiboard design. For noise problems, I need to place bypass capacitors each Vcc and GND pins for each lately but since those pins are hidden in Multisim, I do not know how?
The v11 file is attached.
VCC and ground are virtual components, which means by themselves, they do not transferred to the CCP. Generally, what happens is that you place a connector and VCC and GND on this connector. This connector then you will help make the connections required to VCC and GND on your physical PCB. In Multisim's database, there is a group called the connectors which has a wide selection of connectors you can choose from.
I hope this helps.
Tags: NI Software
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Hi Nico,
Here are the results of my 6353 running a DO loop to HAVE (high and low)
So, at the logical level above I see noise on the order of what you described. Logical low my noise is significantly lower. I guess it depends really how noisy your mass plan is and what does the Board of Directors, as well as what is connected to it.
* Edit, I suppose a more legitimate test would be to use an array 2 to measure the output voltage. I still think that this test has some merit by showing that little noise on the line is not uncommon.
In any case, since the lines are outputs digital, the spec just says that they must reach TTL voltage levels (< .4v="" for="" a="" logic="" low,="">2.4V to the logic of the top). I did all the typical numbers for the noise on the lines, but what you see does not seem unreasonable. Have you tried the bypass capacitors by adding to your relay by chance?
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