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Questions tagged [topology]

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7 answers
488 views

Using an N-channel FET as a switch

I want to use an N-channel FET as a pass gate SPST switch to let an FTDI reset signal through to to my microcontroller or not, based on an independent signal. simulate this circuit – Schematic ...
vicatcu's user avatar
  • 22.8k
0 votes
1 answer
34 views

LED indication for driven n-FET inputs

Given that I'm using a microcontroller (e.g. an ATtiny85) output pin to drive the gate of an n-channel FET (e.g. NTMD6N02R2G) acting in the role of an SPST switch, is there any issue with either of ...
vicatcu's user avatar
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5 votes
2 answers
1k views

Do you know about topologies that look like this?

I'm working on a new topology. I looked it up myself, and it says "3-level boost converter" has a low inductor. Is this right? How do I search it?
kogyu's user avatar
  • 119
0 votes
2 answers
122 views

Token Passing: Multi Master Protocol Initialising problem

I am into developing a protocol using Token Passing topology. For Physical Layer RS485 will be used. All the nodes will be connected in a daisy chain. No node is initially known the address of the ...
Israr's user avatar
  • 249
0 votes
0 answers
56 views

Unknown DC-DC topology

I am working with a BMS that has a daughterboard attached that I assumed was a DC-DC converter but now I am not so sure. Here is the broad circuit overview that I have derived: simulate this circuit &...
pbandjazz's user avatar
  • 337
0 votes
1 answer
232 views

What is the difference between the Sallen-Key and VCVS topologies?

According to Wikipedia, the Sallen-Key is a special case of the VCVS (voltage-controlled voltage-source) filter topology in which the gain is unitary. The topology is: The VCVS refers to the non-...
Rubem Pacelli's user avatar
1 vote
1 answer
98 views

Topology of a non-inverting op-amp with bias

I have been trying to decide the best single-supply non-inverting op-amp topology to use the ADC of an ATmega uC for capturing the signal coming from SCT013-030-0-30A-0-1V split-core current ...
umarcor's user avatar
  • 153
1 vote
0 answers
64 views

Optimal topology for high-power small factor SMPS

I'm trying to design a relatively small and compact SMPS for an output rating between 200/300 W (400 V in and 20 V out). The AC input from mains is rectified and filtered and fed to a PFC boost stage ...
KMN's user avatar
  • 388
1 vote
1 answer
178 views

Why does literature call the response of an antenna array the array "manifold" vector?

Van Trees' Optimum Array Processing and other works (e.g. Wikipedia) refer to an antenna array's response (shifts in phase and differences in gain due to the angle of reception) at each element as the ...
gibbss's user avatar
  • 111
3 votes
4 answers
463 views

What is an integrator topology?

I'm a hobbyist building lamps using Arduino's, LED lights and MOSFET's. A few times now I've seen a reference to "integrator topology," also in relationship to diagrams with MOSFET's in them....
Pieter van Ginkel's user avatar
1 vote
2 answers
203 views

Two different topologies for flyback

I heard someone say the QR (quasi-resonant) flyback has a smaller primary side current than an ACF (active-clamp flyback) under the same circumstances. Is this correct? I tried to search for ...
Magnetic778's user avatar
2 votes
0 answers
95 views

Is there a name for this transistor configuration?

The transistor configuration found in the schematic below can be used as the input to an op-amp that can work with a common mode input at or above the high supply rail. For example this configuration ...
Math Keeps Me Busy's user avatar
1 vote
1 answer
282 views

Topology and protocol for boards connection

Would like to have some insight on which data protocol to use to communicate between a master and several slave boards on a project i'm working on. My initial idea was to daisy chain all the slaves. ...
Fperola's user avatar
  • 11
2 votes
1 answer
485 views

Advantage of the very common electronics-lab.com linear power supply circuit

I'm in the process of designing my own lab power supply. During my research I came across a design from electronics-lab.com that seems to be very popular for DIY adjustable power supplies (here is a ...
Max Klein's user avatar
  • 161
1 vote
2 answers
283 views

Why does 10BASE-T require hubs?

As I understand it, some of the physical layer options for Ethernet include:\ 10BASE5 (now considered obsolete): a single length of thick coaxial cable. 10BASE2: thin coaxial cable, of which multiple ...
rwallace's user avatar
  • 563
0 votes
0 answers
58 views

Method for minimizing relays in a switching/steering network - combinatorics algorithm?

I'm developing an industrial power device which has multiple power supplies that need to be multiplexed to multiple outputs (MIMO) through a network of relays. Similar to how digital logic can be ...
user82081's user avatar
0 votes
0 answers
172 views

MOSFET H-bridge for DC motor

I'm planning to make PCB with two H-bridges for two windshield wiper DC motors @12V that can draw 20-30A at higher loads (normal operating range, without load is 2-3A). I want to drive H-bridge in ...
electronics's user avatar
0 votes
1 answer
708 views

Can 10Base-T1L / 10Base-T1S Ethernet be used in a bus topology?

Old 10mbit standards like 10Base2 (thinnet) and 10Base5 (thicknet) are used in a bus topology, multiple devices are connected to one continous cable (or with BNC T-connectors, but same principle). Is ...
Zciurus's user avatar
  • 341
0 votes
1 answer
290 views

Totem pole driver topology (inverting amp)

Hello guys this question is regarding a gap in my knowledge regarding transistors specifically the driver of the totem pole configuration. Based on the following figure And these results here: When ...
Raj Nar's user avatar
0 votes
2 answers
1k views

CAN Bus Topology, is it possible to have "T" shape topology?

I know that for a thumb rule, it is possible to have a length of CAN Bus network with: Speed [Mbps] * Length[meter] < 50 . i.e., with 0.5Mbps, it is possible; source. But, is it possible to have ...
oak's user avatar
  • 174
1 vote
1 answer
115 views

What's the name of this DC-DC topology?

I was helping some friends that wanted to add a light load to a DC power rail in an industrial installation. The voltage to this rail comes from an array of voltage sources, with one voltage source ...
anrieff's user avatar
  • 5,469
4 votes
4 answers
1k views

Unknown DC-DC converter topology in ST datasheet

I have found this weird DC-DC converter topology in datasheet of MC34063 from ST. The primary charging is single ended, so at first it seems like flyback, but it has four diodes on the output instead ...
Jano952's user avatar
  • 85
0 votes
2 answers
2k views

CAN bus expander circuit

I am trying to design a CAN bus expander. In this case I could implement star topology of multiple buses in parallel. It would avoid having problems with reflections and delay. For this purpose I ...
unalignedmemoryaccess's user avatar
0 votes
0 answers
91 views

Is backfeeding BD9C601EFJ buck converter IC a problem?

So I've got a circuit like that [Values are completely random, I didn't set them yet, the question is only about topology]: The circuit is intended to charge a 2S battery through F3, however when the ...
Wiktor Tomanek's user avatar
0 votes
0 answers
112 views

Which better welding inverter topology

I have build a welding inverter using two switch forward (reference based http://danyk.cz). But I used Irgpc40u igbt(single each side) and sg3525 pwm. I test it at 900watt power line, 1.6mm electrode. ...
Hida's user avatar
  • 67
3 votes
3 answers
625 views

I2C differential network architecture using PCA9615

I'm building an architecture for a large scale robot (3x3meters) and I would like to build a specific architecture around I2C differential to control motors drivers (this should be noisy). My problem ...
robotsmith's user avatar
0 votes
2 answers
218 views

Where do electric circuit topologies come from?

The question is pretty straight forward but allow me to expand. If not clear, by circuit topologies I mean connections between circuit elements/blocks. What branch of mathematics deals with this? Do ...
calculusnoob's user avatar
4 votes
1 answer
133 views

Linearizing multi-star network for home automation

I'm designing a communication network for private home automation. My design goals are: Local wrt network changes. That is, changing one part of the network should not require modification of the ...
Petr's user avatar
  • 761
1 vote
1 answer
165 views

Create a synchronous network of 400 devices

I have around 400 devices that i want to address in a star topology. Each device controls a set of LED strips (27*12 resolution). The idea is display a video animation in a good frame per second rate (...
Mohammed BENHADINE's user avatar
0 votes
1 answer
244 views

Feedback topology of a common emitter circuit

I was studying the topology of this particular circuit. I do not understand how the topology of this circuit is considered series-series. I can see it in input , but at the output it would make more ...
Catarina Branco's user avatar
3 votes
0 answers
242 views

2KW - 48V - 240v / 50Hz UPS - Unknown Topology

I am refurbishing a 2kw ups that a friend gave to me. It had failed and had been left in a shipping container on a site and the PCB had suffered some low level corrosion. The PCB is a 2 layer board, ...
PowerSolar's user avatar
4 votes
2 answers
1k views

How to select DC-DC converter topology?

I would really appreciate some help on this one. I am doing my bachelor's thesis/project which requires me to design and construct a DC-DC converter. I have been working on it for a couple of weeks ...
David Hansen's user avatar
0 votes
2 answers
258 views

Possible ways to represent a circuit schematic

I have the following circuit with a 9V battery and two resistors, R1, R2, in parallel. Here is how it looks: Are the following three ways all valid ways to represent this circuit? Explanation: In ...
David542's user avatar
  • 669
11 votes
6 answers
2k views

Feedback Topologies

This is my homework problem. I tried to solve this problem but i got it wrong. Here is the problem: As it is clear from the circuit that we are taking voltage at the node V0 and some fraction of ...
Anurag Rag's user avatar
3 votes
1 answer
774 views

Designing a CANbus+DC power network of sensors

I'm designing a network of sensors to be placed in an outdoor environment, see the attached diagram. The network will consist of 30 data acquisition boards (very low power consumption), divided in 10 ...
Gaspar S.'s user avatar
6 votes
2 answers
351 views

How is circuit topology chosen in analog designs?

Suppose I'm an experienced analog designer, e.g., RF, power electronics, ADC. How does choosing a circuit topology fit into the overall workflow for a typical work assignment? I imagine my manager ...
Dragonsheep's user avatar
0 votes
1 answer
98 views

What is the name for the low pass topology in this figure?

I am a student researching physics and I am currently fixing some old equipment (RF signal attenuators for our acousto-optical modulators), I found the control voltage passing through a low-pass ...
wcc's user avatar
  • 113
2 votes
1 answer
166 views

Circuit topology name and function for PNP transistor in light barrier circuit

I have seen this rather simple circuit for end position detection of a DC motor drive mechanism. An infrared LED (V402) and a phototransistor (V401) are used as a light barrier. Can someone give me a ...
Stefan Wyss's user avatar
  • 7,653