# Tag Info

## Hot answers tagged signal

3

The clock speed (well, data rate) that a wire can carry is limited ultimately by its bandwidth and the presence of noise. This is formalized in Shannon’s Information Theory. Some light reading here: https://www.scientificamerican.com/article/claude-e-shannon-founder/ Anyway, the data rate chosen depends on the needs of the application. I2C is designed to be ...

3

Apply the definition of Laplace (see the limits of integration) and write down the formulas. Think that Laplace is property additive ? You can therefore write Laplace formulas for each term for the first one : a) and c). For the b), think a little about after writing down the formula cos with complex exponentials. When done, poles and zeros appears clearly. ...

2

Negative frequencies are not intuitive. They appear in Fourier transforms because those transforms present signals as sums of complex exponentials exp(j(2Pi)ft). Presenting signals as sums of usual sines would be perfectly possible and they would not need negative frequencies, but algebraic manipulations and formula derivations would become much more ...

2

It's not a dumb question. In the case of your graph, the frequency is negative with respect to the centre frequency. So if centre frequency is 10MHz, and we talk about the 3dB points being +/-1MHz, they are 9 and 11MHz. If you want to put a 100MHz square wave through an opamp, you will indeed need a bandwidth much more than 100MHz. Square waves have odd ...

1

The part number you have, M3021, is a mV output device, so according to the datasheet should have a load resistance of minimum 1 Mohm. Offset voltages at the LM358 may result in a voltage close to or even below ground. Although the input common mode goes below 0 V, the output certainly doesn't. Your amplifier may not be driving the output correctly near to ...

1

It simply means that with a faster clock you can update the GPIO extender pins faster, using less time, which allows for using the time or the bus for other purposes. But different buses have different specifications, which dictate what frequencies can be used, or must be used. The buses you ask are all for different purposes, so they have quite different ...

Only top voted, non community-wiki answers of a minimum length are eligible