Comment by periblepsis on Y parameters for a two-port network (basic...
@VoltageSpike I think Raquel has provided the complete solution. There's nothing to add. It's correct and complete. The question is why is there a zero in the circled set of equations and in the right...
View ArticleComment by periblepsis on level shift a 0-20V pulse to +,-10V without...
@Fateme So delay isn't important? Just want to be sure. In any case, you are talking about either a fast Schmitt (discrete or from one of the very fast families like AVC -- though that won't come close...
View ArticleComment by periblepsis on auto-direction-sensing mosfet for voltage translator
I'm not sure -- haven't tried to think though what I see there. But have you considered it may be a simple bidirectional galvanic connection and positive feedback between T1 and T2?
View ArticleComment by periblepsis on Why I am getting wrong aM on Tinkercad?
You need to subtract away the LED voltage from 5 V, first. Plus, and i don't know if tinker handles this, but the I/O pins also have some source resistance that does not show on the schematic but does...
View ArticleComment by periblepsis on LTspice models for 3.3V or 3.5V Zener diodes
They have already got 3.3 and 3.5 volt zeners in LTspice.
View ArticleComment by periblepsis on Level shift a 0-20 V pulse to +,-10 V without...
@Fateme So delay isn't important? Just want to be sure. In any case, you are talking about either a fast Schmitt (discrete or from one of the very fast families like AVC -- though that won't come close...
View ArticleComment by periblepsis on Why I am getting wrong mA on Tinkercad?
You need to subtract away the LED voltage from 5 V, first. Plus, and i don't know if tinker handles this, but the I/O pins also have some source resistance that does not show on the schematic but does...
View ArticleComment by periblepsis on Implementation of Op-Amp
@Knowledge I didn't ask for a computation based upon someone else's already existing design. This is your design. Assume a balanced Vcc and Vee such that Vcc+Vee=0. Set Vcc=10 V. Select a BJT family....
View ArticleComment by periblepsis on How to implement the Instruction Set in Logisim
You write 7-bit CPU but the only thing discussed later that matches the number 7 is the immediate constant value in a 16-bit instruction. You have 8-bit registers and 16-bit instructions? So how did...
View ArticleComment by periblepsis on How to get Transfer Function from R to Y?
Are you not allowed to simply solve Y=((R+D*GF-Y)*G1+D+Y*G3)*G2 for Y?
View ArticleComment by periblepsis on Implementation of Op-Amp
@KnowledgeS Once you get through that process and, perhaps, try out a few different ideas of your own on it, too, then you may be ready to take on some problems with respect to mismatched BJTs. The two...
View ArticleComment by periblepsis on How to use Fourier analysis for a daily sound?
@AirCraftLover There is a Fourier Transform and to use it you need the input description in math form. But there is also the Discrete Fourier Transform. It can operate on sampled data. There are a...
View ArticleComment by periblepsis on Passive filter design from transfer function
@slimcolt Also, how do you expect to get \$+20\:\text{dB}\$ of gain from a passive network? (I would like to know. I think I could make bank on the idea if you share it with me.)
View ArticleComment by periblepsis on The equation \$ \beta_{e}=\frac{I_{C}}{I_{B}}\$...
The full Ebers-Moll covers all cases, including cutoff. And that level I version is the simplest/earliest ever made. There are two more Ebers-Moll levels, plus Gummel-Poon and several modifications of...
View ArticleComment by periblepsis on How do you find the Total Current in an RC circuit...
Each part is in parallel to a source. So if you find the current in each one and then just add them up, you will get the right answer. I get 191.319171 mA and the angle is 65.0154948. Which is what you...
View ArticleComment by periblepsis on Multi-Stage Amplifier Help
It's like 8 mW into 100 Ohm! Simple 4 BJT class-A with global NFB to set the gain (among other benefits.) That's all, I think.
View ArticleComment by periblepsis on I supplied 9V for a BJT transistor analysis. How...
@PococuranteBird This is your circuit, drawn so that positive is on top and negative in towards bottom. You've placed 0 V in the middle. So there will be negative voltages with respect to that place in...
View ArticleAnswer by periblepsis for Passive filter design from transfer function
The transfer function solution for your circuit is the following KCL result:$$\frac{s\,R_2\left(C_1 + C_2\right) + 1}{s^2\,C_1\,C_2\,R_1\,R_2 + s\left(C_1\,R_2 + C_2\,R_1 + C_2\,R_2\right) + 1}$$It's...
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Answer by periblepsis for Multi-Stage Amplifier Help
The specifications of \$A_v=200\$ (\$\approx 46 \:\text{dB}\$) into \$R_{_\text{L}}=100\:\Omega\$ with \$v_{_{\text{IN}_{PP}}}=10\:\text{mV}\$.Calculates out to \$v_{_{\text{OUT}_{PP}}}=2\:\text{V}\$....
View ArticleComment by periblepsis on Capacitance Formula derivation
@Andr7 Capacitor energy: \$E_{_\text{C}}=\frac12\,C\,V_{_\text{C}}^2\$. Take the differential: \$\text{d} E_{_\text{C}}=C\,V_{_\text{C}}\,\text{d}V_{_\text{C}}\$. Re-arrange their equation to find...
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