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Posts by Mu3‭

18 posts
84%
+9 −0
Q&A Why do DC/DC switching controllers seem to favour the buck-boost topology over similar ones like Cuk, SEPIC and Zeta?

I am looking at various DC/DC converter topologies for a power system I am designing. The most suitable topology for me is one that can perform both step-up and step-down functions, so I am looking...

2 answers  ·  posted 3y ago by Mu3‭  ·  edited 9mo ago by Lorenzo Donati‭

83%
+8 −0
Q&A How long does it take for energy to propagate in a circuit?

The premise In a recent video by the pop-sci channel Veritasium, the concept of the flow of electricity and energy transmission in a circuit was discussed. In that video a thought experiment is pr...

5 answers  ·  posted 2y ago by Mu3‭  ·  last activity 2y ago by coquelicot‭

Question power DC
81%
+7 −0
Q&A Why 3.3V instead of 3V?

This question popped up in the feed and I got curious. Here is what I could find. Note that I am not an IC engineer so my interpretation of some facts may be off. The 3.3V level is defined in the ...

posted 3y ago by Mu3‭

Answer
80%
+6 −0
Q&A Altium. Reusing schematic symbols for pin-compatible parts.

New versions of Altium (22.x) changed their approach to component libraries. You now create components, to which a symbol and several footprints can be tied. This allows you to reuse symbols acros...

posted 1y ago by Mu3‭

Answer
77%
+5 −0
Q&A Soft-start circuit behaviour

Let's take a soft-start circuit that looks like this: To my understanding, the function can be described as follows: C1 charges to open the gate. Value of C1 will dictate the soft-start delay...

1 answer  ·  posted 8mo ago by Mu3‭  ·  last activity 8mo ago by Olin Lathrop‭

Question MOSFET DC
75%
+4 −0
Q&A Design considerations for a synchronous DC/DC converter

In the field of DC/DC conversion, one can build a synchronous DC/DC converter (also referred to as synchronous rectification). This practice involves replacing a diode with a MOSFET switch. As far...

2 answers  ·  posted 3y ago by Mu3‭  ·  edited 9mo ago by Lorenzo Donati‭

75%
+4 −0
Q&A What are some best practices for library management?

Most CAD packages use a "symbol" and "footprint" library approach when it comes to designing schematics and PCBs. Some (like recent versions of Altium) have "component" libraries where symbols and ...

3 answers  ·  posted 7mo ago by Mu3‭  ·  last activity 7mo ago by H_H‭

Question PCB schematic
75%
+4 −0
Q&A Via on pad: acceptable or not?

I am designing a PCB with somewhat limited space. To save space, I am placing some vias on component pads. However, I am not sure if this is a good practice in PCB design. As far as I understand, t...

1 answer  ·  posted 2y ago by Mu3‭  ·  last activity 2y ago by Olin Lathrop‭

Question pcb-layout
75%
+4 −0
Q&A What are the key programming skills for an embedded systems engineer?

I am looking to improve my knowledge of embedded systems programming, specifically regarding microcontrollers and embedded Linux systems. A lot of the information that can be found regarding C/C++...

1 answer  ·  posted 1y ago by Mu3‭  ·  last activity 1y ago by Olin Lathrop‭

71%
+3 −0
Q&A Type II compensation network for a non-ideal transconductance amplifier

I am designing a DC/DC converter in the control loop of which a transconductance amplifier (OTA) is used. This part of circuit looks like this: To determine the needed characteristics, I am usin...

1 answer  ·  posted 2y ago by Mu3‭  ·  edited 2y ago by Mu3‭

71%
+3 −0
Q&A Pick & place file generated by Altium does not match the actual component rotations/positions

I am generating files for manufacturing my design in Altium 22 and ordering through Eurocircuits. What I noticed during the ordering process is that the rotation of many components (and sometimes ...

1 answer  ·  posted 2y ago by Mu3‭  ·  last activity 1y ago by DSI‭

Question pcb-assembly Altium
66%
+2 −0
Meta Creating a FAQ: how to read a datasheet

I think the Papers section can be suitable. In the category description post it says: Example of paper topics: [...] A survey of scattered information, with the paper putting it all in one place...

posted 2y ago by Mu3‭

Answer
66%
+2 −0
Q&A Using arc trace routing instead of 45 degree trace routing

Most modern CAD software for PCB design offers arc trace routing or a form of conversion between 45/90 degree angel trace routing and arc trace routing. Despite this, the overwhelming majority of c...

3 answers  ·  posted 1y ago by Mu3‭  ·  last activity 1y ago by Lundin‭

Question PCB pcb-layout
66%
+2 −0
Q&A Input offset voltage/bias current noise contribution in operational amplifiers

In noise analysis of operational amplifiers, the following is considered: Noise generated by the external components (resistors in feedback network etc.) Noise generated by the operational ampl...

1 answer  ·  posted 3y ago by Mu3‭  ·  last activity 3y ago by Olin Lathrop‭

Question noise opamp
66%
+2 −0
Q&A What is the purpose of paralleling capacitors on the input/output of a power converter?

In the design of a power converter, picking the appropriate capacitors for the input and output of the converter is quite important. It is relatively easy to calculate the necessary values for a gi...

1 answer  ·  posted 3y ago by Mu3‭  ·  last activity 3y ago by Olin Lathrop‭

60%
+1 −0
Q&A Regulated charge pump design

I am working with an IC that uses a partially intergrated regulated charge pump. The circuit looks like this: It behaves like a voltage doubler. However, when looking at other regulated charge p...

1 answer  ·  posted 1mo ago by Mu3‭  ·  last activity 1mo ago by Olin Lathrop‭

Question chargepump
54%
+4 −3
Meta Quality control of the site

Let's take a look at the state of affairs for the past few weeks on this forum. For the past two weeks, some users has been posting a lot of questions, a lot of them self-answered. This is not a p...

1 answer  ·  posted 2y ago by Mu3‭  ·  edited 2y ago by Mithical‭

Question discussion
50%
+3 −3
Meta Let's make all downvotes public

It seems to me like the goal of the proposed change is to fight vandalism. I am pretty certain that no online forum has found a way to stop trolls, simply because trolling is one of the ways people...

posted 2y ago by Mu3‭

Answer