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# First Course

1000 Threads found on edaboard.com: First Course

## Need information about related application to power electronics

Hello, I'm working on a course of the basics of power electronics. I've gone through some simple examples, but I want to learn some stuff about other bigger real life applications; like this is a Thyristor-Power-Co

## BJT amplifier design

51dB (voltage) gain is A=355 A=gm*Rout assume best case Rout=Rload Then gm must be 355/50K or 7mA/V If you can find a transistor with this kind of gm and decent Early voltage then a single CE stage could do it. If Early voltage is a problem then cascode it (CB over CE) Of course input impedance match will cost some base current so you will

## AC-DC power supply design

Suppose you pre-charge the capacitors directly from an auxiliary power supply? Install a plain diode and resistor, calculated so caps take a second or two to reach 90 percent running voltage. Power ratings can be small due to short operating time . Turn it on first briefly, then apply full power. The diode prevents accidental backward current flow

## Designing an amplifier with particular values

Hi everyone, As part of the course i took in analog circuit i required to design an amplifier with these values: Rin= 52kohm Rout = 53 ohm A=35 gain in db F-3dblow = 400hz F-3dbhigh = 400khz M1= 40db/dec M2 = -20 db/dec Dc supply voltage are : +5 v , -5v Transitors are ntype BJT My idea was using a simple CE amplifier with 2 resis

## three phase volt measurement using resistor network method

I don't see a specific reason in the code for getting outliers in the first channel. Determining the absolute maximum of instantaneous voltage is however a poor method to measure AC voltage. A simple reason might be that the input voltage is actually distorted, or there can be crosstalk on the PCB. I would try with a low pass filter, e.g. 10

## very simple and short inverter circuit

It is your video so you should know! In truth, yes it will work but it will be very inefficient and the LED lamp will not light at full brightness. first problem: Stepping the voltage up by 145 times also steps the current up by that amount, example for a 6W LED lamp, the current from the battery would have to be around 5 Amps for it to reach ful

## Reducing RAM & ROM consumption in coding

How can I rewrite this code to use less RAM & ROM? ADC: 10bit. Speed: 1MSPS. Data input range: 0-5V. CPU: DSPIC30F2010; 16bit. This code is working fine. But consuming 25% of total ROM & 40% RAM. I need suggestion to rewrite this code so that I can save some RAM & ROM. I need at-least 20 samples to get the best result. Signal is both AC & D

## Trans-impedance Amplifier using OTA.

Hi guys, I'm trying to design a transimpedance amplifier for optical receiver, based on this acrticle: the requirements: -VDDA=1.8V -Cload = 200fF (the output of the amp loaded by 200fF) -the total gain At=Vout/Ipd = 3000, (Ipd is the current source on the left on the schematic) -BW>2

## How can we send multiple bytes via UART?

A UART can only send one byte at a time, some have a FIFO buffer that allows more than one byte to be queued for sending but the general principle is to load the first byte then monitor for the UART to signal it has been sent. The next byte can then be loaded to it and so on. UARTs have status registers or interrupt pins to alert you when they are

## A new group for antenna RESEARCH on

I recently set up a group The group was set up to provide a forum for discussion of moderately advanced to advanced antenna research. Typically this will mean from undergraduate research projects in universities to more advanced topics. Here's a Wiki

## The magical audio filter other opamps?

The circuit isn't particularly optimized for bipolar low-noise audio amps like NE5534, e.g. regarding resistor dimensioning. Thus a standard low noise JFET OP like good old TL071-TL074 would be my first choice,

## Tetramax appropriate commands for stuck at 1

So I want to see what are the input patterns of the design which has an output of stuck at 1 at the output named 'outtt' of my behavioral verilog code (of course which I later synthesized)...what should be the appropriate commands for tetramax for this? :?:

## Finding the input impedance of CCCS

Good day everyone! I need your help on this one. I'd like to derive the equation for the closed-loop input impedance of the circuit attached. The final form of the equation is also shown below. 157314 157313 Here's what I have tried 157316 I was stuck. Can you tell w

## Integrated Circuits Filter Resources-Active RC, OTA/GM-C, Switched Capacitor Filter

Hello, I am interested in learning about analog integrated circuit filters - Active RC, GM-C, OTA-C, Switched Capacitor Filters. Can anyone recommend books for learning in this field, with numerous examples ? I like the Valkenberg Analog Filter books and also the Laker and Sansen book. Any other books ? Any course notes or course websi

## Microcontrollers and a lot of advice - PIC , AVR, ARM - Software - Books - Boards

Hello, I'm new to the forum but hopefully you guys will give me some great advice. I have been programming microcontrollers for the past five years, only as a hobby but I do plan to move to this as my career, I am currently a machinist but I don't quite have the means for university yet. I'm 27, so should still be capable of learning :razz:

## Scraping PCB causes ESD damage to IC?

Hi, In the attached schematic, I had been soldering components on and off the board many times, in the vicinity of this circuit. On some occasions, I accidentally used a plastic handled metal pointy object to scrape away the burnt up solder resist and general gubbins off the PCB. The point was metal but I sometimes forgot and held it by the p

## Realistic Monte Carlo setup

Hi All, I'm wondering about which Monte Carlo setup will accurately represents statistical distribution in silicon on mass production. There are 2 cases that I'm considering: Case-1: Global Corner + Local MC In this case I vary the Corner manually (ie. Typ, Fast, Slow, FS, SF) and run Local MC with each of them Case-2: G

## Star topology chipset for long range (high power) comms

Hi everyone, For a project involving multiple drones communicating to a single base station, I'm looking for a chipset (or alternatively a module) that supports a star topology network (i.e. multiple transmitters sending data to a single receiver). I need quite a bit of range (about > 2 km) with antennas that aren't ridiculously large since they

## DC Booster for Solar Pump

I would like to design a dc booster for a solar system. System consists of 6x 265Wp panels in series, which equals roughly 1600Watts, 200V, 9 Amps. I need to boost the voltage up to 350V to feed into a VFD which in turn drives a 0.75kW motor. Is this possible? Where should I start? Thanks

## How to assign bit values at once to different port pins of different I/O ports?

The processor can only write to one port at a time. I don't aim a parallel work. I have microchips explorer16/32 development board. And 8 LED's on that board are driven from different ports. (4 of them are from PORTA, 3 from PORTB and one is from PORTC) As i sad in my first post i try to send an ON-OFF command to a