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I knew Sin is not a transfer function.
Transfer function was shown in the first attached picture. I upload it again here:
It doesn't say S11=0. How do you get S21=1?
Thanks for your reply.
Hi,
When I read the online tutorial, it gives this transfer function. I wonder where the '2' in the denominator comes from. In elsewhere I see a matched condition would result S21/2, but it doesn't mention a matched condition here.
Can you tell me something about the '2'?
Best...
Why does the available power equal abs(b)^2-abs(a)^2?
Hi,
I read a S-parameter tutorial. It first has such an equation:
Then, it has another equation:
I am puzzled why they are so different?
Can you explain it to me?
Best Regards,
Hello,
I am familiar with DSP in recent years, but not in analog circuit analysis. When I try to simulate a charge pump circuit in a PLL, I have a few questions on the charge pump.
1. A RC network behaves different for a voltage source and a current source. For a current source, the voltage...
Hi,
When I read the below description, I can't follow the column manipulation to get (3.5)
When to do the row reverse, we get the two right vectors but without conjugate signs. If we do the column reverse on R5, I think we have to reverse the two vectors again, but it appears not do so on the...
Thank you for your reply. I did not express my question clearly in my first post. I mainly don't understand the right part of the first equal sign, i.e. which had 'tan Bl' . I see an equation for Zin having (1+Lamda*exp(bl))/(1-Lamda*exp(bl)). The 'tan' part in the picture seems has used...
Hi,
I am new to RF. After some time thinking, I still cannot get the answer. For 2-port device, port-2 is open. Z_in is given below. My question is how I can get the numerator and denumerator? i.e. I don't know where the fraction part is from.
Thanks,
Could you tell me where I can learn this equation?
Hello,
I read below equation on a slide. I am new to this topic and would like to learn about it. Could you tell me the name and what tutorial could talk about it on line?
Thanks,
- - - Updated - - -
Excuse me. I know now it is about...
Sorry, I am confused now with 0.5/18°. What does 0.5/18° mean in below? How is it obtained? Can I calculate it from 2.5-j1?
If it is zL's reflection coefficient, the angle should be -18°. Am I right?
point L represents a normalized load
impedance z L = 2.5 – j1 = 0.5/18°
Thanks,
Hi,
I learn Smith chart from this tutorial, but I find its description is different from its figure.
First of all, I cannot get the normalized impedance (0.5, 18 degree). At least the angle should be a negative value.
z_L = 2.5 – j1 = 0.5/18°
Could you help me on the understanding?
Thanks,
Hi,
I learn SystemC on web site:
https://asic-world.com/systemc/process6.html
It has a local watching example project, but the new 2.3 SystemC on my PC does not support it. Do you know what coding syntax can do the same job?
I've solved a similar example problem on "reset.delayed()", but...
Hi,
I read an article on division using LUT. It says:
"Since b is a 16-bit number (used in 1.15 format), there are (2^15 −1) = 32767 different values of 1/b. "
That is, it uses 16-bit data, but has 32767 different values. I cannot make it through, as it only needs 15-bit is enough. Can you...
Hello,
I know Decision Feedback Equalizer when I did research in university. Now I am interested in its ASIC chip implementation. This paper is interesting on its DFE implementation.
IEEE JOURNAL OF SOLID-STATE CIRCUITS, VOL. 45, NO. 4, APRIL 2010
Page 909
A 21-Gb/s 87-mW Transceiver
With...
Could you explain the formula symbol in an algorithm to me?
Hi,
I am implementing a DSP algorithm, which relates to some statistical research. Unfortunately, I cannot understand the symbols in the following equation. I think I can continue to the next part after a basic understanding the below...
Hello,
I wrote some Verilog code a long time ago. Now I get some VCD code as below. I find some lines cannot be understood, such as:
$dumpvars
xaaaaa
xaaaab
xaaaac
xaaaad
$end
#1
1aaaaa
I guess that the above question could be resulted from below:
$var wire 1 aaaaa A $end...
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