1000 Threads found on edaboard.com: Analog Pulse Width Modulation
if you at the Microchip example programs
Microchip Technology Inc. is a Leading Provider of Microcontroller and analog Semiconductors, providing low-risk product development, lower total system cost and faster time to market for thousands of diverse customer applications worldwide.
you will fi
Microcontrollers :: 05-19-2011 16:36 :: horace1 :: Replies: 1 :: Views: 679
Please I wanna you provide me with a code written in ASM for 8051 that perform the pulse width modulation of some date.
Microcontrollers :: 05-01-2005 04:35 :: Sherif Welsen :: Replies: 5 :: Views: 1704
hi there.. please help me.. what is current limitter? and what is the function of current limitter?
what is the meaning of "pulse width modulation"??
thank you very much
Analog Circuit Design :: 06-27-2005 00:30 :: zhi_yi :: Replies: 1 :: Views: 831
I need to know how to make pulse width modulation for my AT89C51....
Know any good tutorial or link for me to check it out?
Microcontrollers :: 12-13-2005 18:58 :: Maverickmax :: Replies: 1 :: Views: 1126
can anyone share the source code to make pulse width modulation for PIC?
Microcontrollers :: 12-15-2005 04:33 :: pierre2030 :: Replies: 3 :: Views: 1240
i want to study the subject of pulse width modulation, and i don't know how to start. can any one helped me to learn about PWM principles and applications.
Electronic Elementary Questions :: 05-15-2006 07:03 :: hamoksha :: Replies: 3 :: Views: 698
please help...can i use pulse width modulation with 89c2051 microcontroller?...and if, how can it be?...:cry:
Microcontrollers :: 09-19-2007 03:03 :: cai2 :: Replies: 4 :: Views: 1476
how can i implement pulse width modulation in an 89c4051/2051 mcu?...please help...
PC Programming and Interfacing :: 10-11-2007 09:55 :: cai2 :: Replies: 6 :: Views: 1774
Hi friends this is praveen working on PIC micro controller 16f877 series till now i have learned interfacing devices to PIC microcontroller.Now i want to learn pulse width modulation technique.I want to learn how to generate PWM pulses with variable duty cycle and constant duty cycle.................
where can i get the (...)
Microcontrollers :: 07-03-2008 01:05 :: praveen_palaparthi :: Replies: 1 :: Views: 549
Does pulse width modulation change the frequency?
Is pulse width modulation a type of Phase modulation or Frequency modulation or is it something else?
Is there any concept of Frequency modulation in POWER Electronics??!
Electronic Elementary Questions :: 11-21-2008 04:11 :: unkn0wn :: Replies: 3 :: Views: 1117
Is there any simple way to explain the pulse width modulation ( PMW ) of NE555 in voltage doubler circuit ???
Analog Circuit Design :: 10-03-2010 23:21 :: No22Ben :: Replies: 1 :: Views: 3221
I'm a first year EE student.I want to learn about pulse width modulation.Would you tell me where can I find resources?
Thanks in advance.
Microcontrollers :: 10-22-2010 07:29 :: Galib_EEE :: Replies: 4 :: Views: 518
Hi every one,
I need pulse width modulation application program for LPC2929 processor.
Microcontrollers :: 12-29-2012 00:18 :: honey 77 :: Replies: 0 :: Views: 219
i am a student who has been experimenting on pwm since i am relatively new so i and my friend implemented a SPWM inverter using a micro controller using push pull topology and and we also implemented another inverter using multiple pulse width modulation where each half cycle is broken down into series of pulses of (...)
Electronic Elementary Questions :: 04-12-2014 06:04 :: maicael :: Replies: 1 :: Views: 358
Hii...generally, the pwm(pulse width modulation) is defined according to the analog input signal as per the definition..but can the digital input data be given as input to the PWM???? So please clarify it.
Digital communication :: 06-12-2012 00:54 :: sridivya pathapati :: Replies: 6 :: Views: 524
helllo friends,can any body explain to me how to read adc,and use the value to alter pulse in case of voltage regulation in spwm inverter
Microcontrollers :: 12-06-2011 17:27 :: judfid :: Replies: 3 :: Views: 622
Besides analysing the circuit, the first point would be to check the results against expectable non-linearity according to AD790 specifications, e.g. "propagation delay versus overdrive".
Generally, no analog PWM modulator can be perfect. Please tell your detail results to allow a meaningful discussion. It would be also interesting how you actu
Analog Circuit Design :: 06-19-2012 03:10 :: FvM :: Replies: 27 :: Views: 1190
Does anyone know of a PWM with pitch control?
Hobby Circuits and Small Projects Problems :: 05-19-2014 06:46 :: CrystalMan :: Replies: 5 :: Views: 403
Is it possible to create a 10 MHz pulse width modulated signal from a FPGA?
PLD, SPLD, GAL, CPLD, FPGA Design :: 09-28-2006 09:35 :: ei99dami :: Replies: 4 :: Views: 1002
How to write a MATLAB program for pulse width modulator?
could you please help me..
Software Links :: 06-24-2011 05:42 :: devika v kurup :: Replies: 2 :: Views: 99
hi all out an electronics student and doing my project. i am using pic 18f4431 microcontroller to produce two sinusoidal pulse width modulated signals that i will use to control my H bridge so that i can construct a simple inverter. i have written some code using ccs but on simulating on proteus i am not getting the required output. the
Microcontrollers :: 07-09-2011 17:58 :: snjugunachege :: Replies: 1 :: Views: 1225
I am making a pure sine wave inverter . In an intermidiate stage i have to drive the mosfets using SPWM. so anyone please tell me how to generate SINUSOIDAL pulse width modulation using ARDUINO board.??
Microcontrollers :: 12-18-2012 19:03 :: --BawA-- :: Replies: 1 :: Views: 864
could u guys tell me
i) advantage of pulse modulation over analog communication such as FM,AM etc...
ii)generally,it is said that pulse modulation occupies more bandwidth when compared to analog modulation it true?if so why?
iii)some discrete (...)
Digital communication :: 01-05-2006 08:23 :: elecs_gene :: Replies: 3 :: Views: 1560
You're mixing three losely related points in your last post. Consequently there's no reasonable answer to it.
Referring to your original question, the modulation input is varying the threshold of the comparator ending the output pulse. Insofern, the instantaneous value of AC voltage matters, it's like being sampled. Unfortunately, the modulaion
Analog Circuit Design :: 07-11-2011 06:54 :: FvM :: Replies: 5 :: Views: 1864
In your motor power control example you are talking about signal width control i.e changing its duty cycle. My question is why do we call it pulse width modulation while it is simply a signal width controlling and there is no modulation involve in it.
In communication PWM is a technique in (...)
Electronic Elementary Questions :: 11-10-2012 01:26 :: tahir4awan :: Replies: 8 :: Views: 553
Using a sawtooth signal to generate pulse width modulated signal
where we compare the sawtooth with the input analog signal
if the sawtooth > signal then comparator output = 1 state
if < then comparator output = 0 state
So the comparator output pulse duration depends on the signal sample level
What the (...)
Digital communication :: 12-27-2005 07:29 :: yousif :: Replies: 1 :: Views: 1171
i was reading a book and there it was written
"we want to increase pulse width as much as we can without producing intersymbol interference"
can anyone tell me whats the reason of increasing pulse width...why do we want to increase pulse width...isnt shorter width (...)
Digital communication :: 01-05-2007 00:34 :: nigosawa :: Replies: 4 :: Views: 1294
Do you actually know what is modulation index and what are the differences betwen analog and digital modulation ???
Electronic Elementary Questions :: 01-14-2008 13:54 :: gnjus :: Replies: 4 :: Views: 1440
Steven W. Smith "DSP: A practical guide for engineers and scientist" (the Bible ;)
There exist an free ebook hosted by analog Devices.
Digital Signal Processing :: 07-29-2009 05:08 :: MiW :: Replies: 1 :: Views: 840
Can anybody suggest me a good paper or book to understand the analog to digital conversion using pulse density modulation in multi-bit ADCs ???
I wanna know how the local average tracks the input...
RF, Microwave, Antennas and Optics :: 08-14-2011 09:19 :: pankaj jha :: Replies: 1 :: Views: 814
Yes it is possible. There is also several methods to acomplis this.
You can get an slight overview over different types here.
Microcontrollers :: 09-14-2011 10:33 :: Prototyp_V1.0 :: Replies: 1 :: Views: 394
You can also check this article
How-to use PWM to Generate analog (or analogue) Voltage in Digital Circuits
Digital Signal Processing :: 01-15-2012 07:42 :: alexan_e :: Replies: 4 :: Views: 1397
I am trying to modulate pulse width of an UPS based upon load connected to it. I mean to say, load current is checked by one ADC. The voltage developed across shunt for load current sensing is so designed that it will read 0.7V at full load. 0.7V corresponds to a decimal value of approximately 35 when converted to digital taking Vref of
Microcontrollers :: 03-03-2012 12:23 :: swapan :: Replies: 0 :: Views: 297
i trying to pulse modulation code
but i don't know the requirements of this coding
plz tell me why are the requirements and how to write the code tell me
i am search the some site their is no information abut us
Microcontrollers :: 05-02-2013 01:59 :: achuth002 :: Replies: 5 :: Views: 219
This thread seems hanging in the aether connected to nothing.
From what I gather the original OP, whoever that is, wants to convert a PWM signal to an analog voltage. The time-tested method to do that is a low-pass filter, sometimes called an integrator.
Edit: Now, post #1 is visible. It was not before.
Analog Circuit Design :: 03-03-2014 18:28 :: jpanhalt :: Replies: 7 :: Views: 369
Here are some papers on class D power amplifier
AES 4917 - Paralleled Phase Shifted Carrier pulse width modulation (PSCPWM) Schemes - a Fundamental Analysis.
AES 4446 - A Review and Comparison of pulse width modulation (PWM) Methods for analog and Digital Input (...)
Professional Hardware and Electronics Design :: 06-30-2003 09:19 :: cesare :: Replies: 15 :: Views: 7369
I am desining a power supply with TL494,but pulse width
could not be changed.
When Pin1>Pin2, Pin3->5v,and P10.1v. How change duty cycle.
A cap 10n and resistor(47k)series P2 and P3.
Professional Hardware and Electronics Design :: 12-15-2003 11:23 :: boram69 :: Replies: 2 :: Views: 1859
I am new to CCS. I want to measure input pulse width on pic16f84a.
If the pulse width is 1ms to 2ms then how can i achieve the best maximum scale result through my code. If any one have code sample then please share.... :? :?
Microcontrollers :: 06-02-2004 13:13 :: dani :: Replies: 2 :: Views: 1450
Please give an example of ?PWM is applied in analog architecture? so I can understand what you mean. Aren't pulses always digital?
Analog Circuit Design :: 08-24-2004 16:00 :: Ante :: Replies: 8 :: Views: 2783
I was designning a pulse generator ( ring oscillator);
The spec need the period to have negative temperature coefficient.
The hotter, the shorter the period.
If I used a RC delay to form the pulse width, the coefficient will be positive because the resistor will be more resistive.
MOS working close to sub-threshhold region have (...)
Analog IC Design and Layout :: 10-28-2004 02:42 :: mike_bihan :: Replies: 3 :: Views: 1206
i am using atmel for my final project about platform stabilizer. Now, i have a problem to measure pulse-width from the gyro using external interrupt 0 dan 1.
could anybody help me?
Microcontrollers :: 11-30-2004 23:09 :: joerieg :: Replies: 1 :: Views: 1422
How can 555 be used as a pulse width modulator. I doubt that frequency also changes if you intend to change duty factor (VCO). Please clarfiy.
Hobby Circuits and Small Projects Problems :: 02-26-2005 00:38 :: nvd :: Replies: 3 :: Views: 1335
I am confuse with the PWM output speed, for example
a 12 bit pwm ,speed 125kbps
what is the formula to calculate the speed 125kbps?
if the pwm output waveform is not 50% to 50% duty,how to define the bit ?
Digital Signal Processing :: 02-27-2005 22:06 :: colonel :: Replies: 4 :: Views: 1114
Ring oscillators are often used as part of a PLL for clock and data recovery, frequency synthesis and clock synchronization. Additionally, ring oscillators have both digital and analog features which make them useful for data conversion tasks such as phase and pulse width modulation.
RF, Microwave, Antennas and Optics :: 05-17-2005 02:59 :: vagarwal :: Replies: 2 :: Views: 1046
In AD9057 chip, what is the minimum input pulse width that output has significant output?
I cannot get any information in its datasheet.
RF, Microwave, Antennas and Optics :: 05-28-2005 09:55 :: david753 :: Replies: 0 :: Views: 534
How do i measure pulse width modulation (PWM) ?
with a oscilloscope?
How do i measure the Duty Cycle of the PWM?
with a oscilloscope?
How do i measure the pulse width?
with a oscilloscope?
How do i measure the Time constant?
with a oscilloscope?
How do i measure the rise time and (...)
Electronic Elementary Questions :: 06-08-2005 21:41 :: walters :: Replies: 11 :: Views: 3123
A good begin is try to find applications notes of manufacturers:
Find this in:
and some others, this topic is find a lot in applications note
Hobby Circuits and Small Projects Problems :: 08-20-2005 13:56 :: leomecma :: Replies: 6 :: Views: 2070
Hi: In 130nm process, what is the minimum required pulse width of PFD, to avoid the dead-zone.
Analog IC Design and Layout :: 11-23-2005 04:47 :: neoflash :: Replies: 7 :: Views: 1352
Could you tell me how to generator a delay and its pulse width
is independent across PVT?
Or show me some reference about ATD circuit for flash memory.
Thanks a lot !!!
Analog Circuit Design :: 11-28-2005 07:00 :: Analog_starter :: Replies: 0 :: Views: 402
Hi! Can anybody help how to measure a pulse width in CCSC? Signal normally high and I want to meaure the duration of a low signal before it goes high again(i.e. a negative pulse in the millisecond range)
Please show two methods: 1. Using interrupt 2. Without using an interrupt.
Microcontrollers :: 12-15-2005 11:54 :: pete :: Replies: 2 :: Views: 4081