Converter Definition and 257 Threads

Hi, I am looking for a compact (possibly a on-chip solution) high efficiency DC-DC dual converter powered by a USB 2 port. The aim is to supply a dual voltage to a logic circuit for driving audio signals from/through different channels, as in an audio switch I.e. MAX4910 or 4912. Any idea...

Homework Statement Assuming that a CUK converter is operating in DCM mode (see attached image), find the solution for M(D,k). D is the duty ratio of the switch, and k... Homework Equations \frac{V}{V_g} = M(D,k) k = \frac{4L_1L_2}{(L_1+L_2)(2RT_s)} The Attempt at a Solution...

Homework Statement I'm given the following circuit http://imageshack.com/a/img850/8576/b3ny.png and given L, V_{in}, D, P_{o}, f_{s} and q(t). How do I go about finding T_{s}, V_{a}, i_{L}, i_{L} ripple, and I_{o}. Homework Equations The Attempt at a Solution I'm honestly not sure how to...

Homework Statement Hello PF :smile: i am stuck with a concept of weighted resistor D/A converter. For a 4-bit resistive ladder, VA={V0/R0+V1/(R0/2)+V2/(R0/4)+V3/(R0/8)}/{1/R0+1/(R0/2)+1/(R0/4)+1/(R0/8)} I want to find out how the equation is derived but have no clue. Thanks.

Hello, I have bought an Energy Take classic 5.1 surround set from the US and I live in Belgium because this set is not for sale in Europe. When I orders it, I had taken into account that the powercord and Voltage were different. But I did not know that it was 60Hz instead of 50Hz. Are there...

Evening all, I'm trying to pick out a suitable DC-DC Converter for our low power gate driver circuitry and I'm unsure about a number of different things. First some background on the circuitry and what the DC-DC Converter is needed for. To date, we've designed, built and tested a low...

Hello :) I have created a flyback converter model using Simpowersystems in Simulink/Matlab. But it always gives me the wrong answer! I have simulated the same system using PLECS and Simscape/simulink and got the correct answer. But with my Simpowersystems model, it always gives me the wrong...

Hi, im currently planning to use PIC 16F877A for implementing smart metering. since I am also learnig .NET, i want to use laptop as my display unit. I also bought a RS232 USB-Converter. But,i don know how will the laptop recognize signal from MC and transmit data to microcontroller?? :frown...

Homework Statement I have to build some converters (only for 4 bits) and i didn't understand how. How do i proceed? Which logical gates combined in such a way give me the y3y2y1y0 answer for x3x2x1x0? For example, build a coverter from EXCES3 to BCD, or from GRAY TO BCD, or C1 complement to C2...

Hi, I've just purchased a 1200W food processor with an induction motor from US that requires 110V, intending to use it locally where the mains supply is 230V/50Hz, thinking I could just get away with a high powered step down transformer. However, after researching, it seems that the motor...

why do we need to add a torque converter to diesel engines used to start gas turbines knowing that the diesel engine has a higher torque than a pneumatic starter? and if we want to change the starting system from a diesel engine to a pneumatic starter, what are the components that need to be...

Whilst looking at the possible parts for a boost converter I came across references to making sure that the capacitor could handle the "ripple current". I looked a bit further and can see 2 possibilities. 1) The ripple in the capacitor current itself ie the difference between the minimum and...

Greetings. I'm making a high power boost converter, supposed to deliver constant current at 15-50V from about 12V input. 100KHz frequency. There are problems, however. There was a lot of ringing at the switch node - meeting point of the diode, inductor and MOSFET. 5.8Mhz clear decaying...

Buck Converter Design for PMDC Motor Introductory Notes: The design article followed in this post can be found here: http://my.ece.ucsb.edu/York/Bobsclass/194/References/NonIsolated/Buck/Buck%20Converter%20Design%20Demystified%20606PET25.pdf This circuit will be used for a motor controller...

So I have been using some small audio amplifier ics in the tda series because they are good and easy to use but I have never had to power one with more than 24v. I am wanting to look into using a chip that requires about 35-40v supply but I can't find a transformer that is past 24v and am not...

I have a successive approximation ADC converter (left) and is connected to a DAC converter. The Vref of the ADC is 10V and the Vref of the DAC is brought fom an internal leg of the SAR. This internal leg is the output of the SAR's internal DAC. The question is: what can be the maximum...

Online Binary converter capable of 64 digits and has "explain answer" Hello, Does anyone know if there is an online binary converter similar to this one: http://acc6.its.brooklyn.cuny.edu/~gurwitz/core5/nav2tool.html but can take 64 digits (bits I am guessing) instread of just 24...

Hi there, (Please find attached diagram) I have Dc-dc Boost converter designed to step up (12-24Volts) to 28.8Volts(10Amps). The converter is currently working perfectly(stepping up 24V-28.8voltage) with a dc power supply, however this Dc converter after completion, will be fed up to a max...

Hi, Here's a voltage-to-current converter circuit I simulated in OrCAD Spice. While the current is supposed to be constant through out the load, it does not seem the case with spice, when altering V or R. Thanks.

Hi all, I need to have an AC current source for testing but i do not have any equipment that can generate an AC current source. I have a function generator to produce an AC sine voltage and thinking to convert V to I using the transconductance op amp. The first stage of my test circuit...

Hello Everyone. I am working on a DC-DC converter design which uses a transformer with an additional inductive element on the secondary side. The coil charges a large capacitor. Since there is an additional inductive element on the secondary side the inductive element builds up a field...

I have an actual flyback converter on a chip and I'm thinking of having a simulation platform to model the circuit on MATLAB. This is because somewhere down the road I intend to modify the inductor by biasing it with a permanent magnet in order to prevent premature saturation. It is hoped that...

I have been studying the plans for a few AC to DC converters and I understand that the basic conceptual design is one where the AC power is transformed to lower the voltage and is then passed through a bridge rectifier to convert that power to what I call hopping DC. The power is then smoothed...

EDIT: I have updated the original post to make my confusion more clear! Hello all, Attached below are the pages from my textbook for which I am concerned. On page 245 we can calculate the average inductor current as follows, I_{L} = \frac{1}{2}I_{max}(D+D_{1}) Now what I thought an...

Homework Statement See figure below. Homework Equations The Attempt at a Solution See the 3 other figures attached for my attempt at the solution. (Parts (a), (b) & (c)) Does anyone spot any mistakes in my work?

Hi all, What is the difference of using an op-amp(transimpedance) vs a precision resistor to convert I-to-V? I am trying to linearly amplify a 1nA-10nA AC current with frequency of 10khz and below to a AC voltage and be passed to other circuitry for further processing. Thank you for...

Homework Statement See first figure for lab attachment Homework Equations The Attempt at a Solution Hello all, I recently did a lab on buck converters and I have a couple a questions. See the figures attached for lab and my work. For Experiment 1: The measured quantities for part b)...

why are we using two diodes instead of two scrs in a single phase half bridge converter? What difference does it make? (say in my attachment s2 and s3 are diodes instead of scrs?) Wont we get the same operation with two scrs itself (only thing you have to fire them together with s1 and s4). I...

Can someone advice how a V to I converter (with IC741 or any other easily available Op Amps) can be made for converting few mV to pA. The converter is to be used to convert the output from a photo-diode preamplifier to a lock-in amplifier with current input. Thank you for the help, in advance.

I have a stepper motor with built-in controller/servo system that requires a supply voltage of 24 VDC +/- 10%. The problem is, the power system I'm using is a lead-acid battery that is normally maintained at a top up voltage of 27 V to 28 V, which exceeds the upper limit motor input. Most of the...

I have a Prolific USB Serial Convertor which has been assigned COM 6. When connected to a device that allows 6 serial ports it works fine. I'm now trying to communicate with a device that only allows up to COM 4, how do I reassign the USB converter to COM 4 or less? I'm running WINDOWS XP 2002...

We all know the Differentiator and Integrator configurations of the Operational Amplifier. I realized that the RC circuits used as low pass and high pass filters can also be used as integrators and differentiators. Its obvious from their differential equations actually. As for current to...

We did several threads about carbon dating. Main message, you've got to know what the caveats are and then it's a good and reliable way to estimate the age of organic material from the last 50,000 years. A major point is calibration, which is improved and refined every few years. There is...

Hi, Something is puzzling me with the HVDC work I'm currently working with. I'm working for contracting company here in NZ contracted to complete the new HVDC converter station. We have 3 x single phase converter transformers on site converting the AC voltage. I was wondering why when...

According to wiki: So can we call an AD converter an encoder?

I am trying to understand the inductor current ramp up to steady state in a buck converter. I don't understand why the inductor current slope is not steep in the beginning. Let's say Vin=12v, Vo desired across the capacitor is 5V. Switch turns ON, Inductor current ramps up. Switch...

Hi all, I need a voltage to voltage converter design(circuit) from DC +/-5V to +/-15V Thanks...

Homework Statement Desigh an n-bit Gray-to-binary converter. Homework Equations bn-1 = gn-1 bk-1 = gk-1 if bk=0 bk-1 = \overline{g}k-1 if bk=1 The Attempt at a Solution I just want someone to give me some hints as to how I should approach this problem... Also, when it tells me to...

Hi. I'm working on a project where I need to convert power from 220V/50Hz to 110V/60Hz. I've looked around but haven't seen anything readily available to purchase. Does anyone know of a converter available for this? Thanks in advance.

Hi guys, I'm new in here and hope I could get some advices. I am designing a 100V-28V DC-DC Buck converter (as per tittle) and has successfully tested on breadboard. The problem is when I've transferred everything to the stripboard, the circuit does not work. This is confusing to me...

Hi everyone, I need your help in designing and controlling a DC to DC flyback converter that operate in both CCM & DCM. where to start? and what is special about these kind of converters? and will i find a ready-made transformer for such a converter? how to choose the right MOSFET? what...

Homework Statement Show that the least significant bit (LSB) corresponds to a change in the analog signal of V/(2^N-1). Homework Equations D=b_0 * 2^0 +b_1 * 2^1 + ... + b_(N-1) * 2^(N-1), where b_0 is the LSB, and b_(N-1) is the MSB. The Attempt at a Solution I have absolutely...

All, I am trying to get my head round a rotary phase converter. Obviously a third voltage is induced in L3 of the motor if L2 to and L1 are connected to the single phase. However, how are L1 and L2 placed out of phase from each other or don't they have to be? Hope that makes sense...

Hello, I'm trying to design a boost converter, Vin =9V, Vout = 30V. I've read several publications about it and I've noticed that some of them ask one to specify the peak inductor current, diode voltage drop etc..how do I know the peak inductor current if I don't yet know the value of the...

http://www.roboticsguy.com/uploads/gallery/album_13/gallery_1_13_9081.png I'm trying to understand how to design a boost converter and have been reading about them for the past week or so. I've come a long way and now understand basically how they work, but I have a couple of questions on...

I have a project where I'm trying to take a variable frequency input signal and converting it to a fixed frequency, variable duty cycle output signal. The input signal is a sin wave ranging from roughly 150Hz to 6kHz. The output signal needs to be fixed at 150Hz with a duty cycle range of...

Hi there, I am using a PC to TV converter fairly unconventionally. I'm connecting a VGA output to a PC to TV converter. This converter outputs a composite video which I then connect to a USB Video Capture Device, which feeds into my computer . The resolution of the image I want to capture...

hello everyone I am facing a problem in designing a current to voltage converter using op amp I have to convert the current in the range of 40 micro amps to a suitable voltage using a T network having 3 resistors on the feedback. Please guide me what component values I have to use and which...

Hi need some help here. I have designed a dc-dc boost converter to give output voltage of 11v from 6 v input. Well it has been implimented on PCB, works fine but one thing i din't understand well. The have adjusted the duty cycle to get my 11volts on load(LED Load), when i remove the load...

I put in 20:00 GMT and asked for EST. It tells me 15:00 EST, which is wrong, according to people here. http://www.timezoneconverter.com/cgi-bin/tzc.tzc But, when I use this site: http://www.timeanddate.com/worldclock/converted.html?month=9&day=18&year=2011&hour=20&min=0&sec=0&p1=0&p2=410...