1000 Threads found on edaboard.com: Ecg Amplifier Circuit
hi, i am curious how to simulate the circuit for ecg amplifier found in this post:
i would like to know what are the amplitude, frequency and phase shift for the left and right arm inputs, and what should be expected for the right leg output? i know that ecg is 0.5mV to 5mV and fr
Electronic Elementary Questions :: 02-16-2008 16:45 :: oermens :: Replies: 1 :: Views: 745
Google: driven ecg amplifier circuit
One result is: Page 15
Though it only shows RA, LA, and RL limb leads (not LL), LEADs I, II, and III are achieved by just selecting which pair of electrodes go to the amplifier's differential inputs.
Common = RL
Lead I = RA-LA
Other Design :: 08-16-2009 07:41 :: KMoffett :: Replies: 2 :: Views: 8199
i need a bit help if anyone can i am making an ecg amplifier using this circuit mentioned in elektor
according to journal the right/left arm signals are amplified with 201 gain and feedback signal is amplified 31 times and then attached to right leg to provied better C
Digital Signal Processing :: 01-19-2011 11:55 :: zelin :: Replies: 0 :: Views: 493
Hi guys i am trying to build an ecg amplifier.. i am trying to build such amplifier which have
amplifier gain: 250, 500, 1000, 2000, 5000
Bandwidth (-3dB): 0.05-500 Hz
Notch filtering at 50 Hz (can be switched in or out)
i am using
intrumentation amplifier = AD620
Op-amp = lm 741
when i am (...)
Analog Circuit Design :: 10-03-2013 10:10 :: red devil :: Replies: 3 :: Views: 301
I am trying to make a simple ecg amplifier using INA 321 and OPA 336. I am driving this amplifier using a an ecg simulator( ), hence I do not have a right leg drive circuit.
My schematic is attached. I have made the circuit on a breadboard for now, the problem that I have is that it works (...)
Analog Circuit Design :: 08-08-2014 17:38 :: vorashrenik :: Replies: 6 :: Views: 319
I need for DVB sattellite receiver a Line amplifier circuit. :?
RF, Microwave, Antennas and Optics :: 01-16-2003 02:33 :: kamilia :: Replies: 4 :: Views: 2547
CMOS RF device modeling and low-noise amplifier circuit design
RF, Microwave, Antennas and Optics :: 06-20-2004 09:35 :: microwaveboy :: Replies: 1 :: Views: 1211
where to get balanced amplifier circuit diagram for practise and learning...pls
RF, Microwave, Antennas and Optics :: 03-25-2005 22:17 :: kent616 :: Replies: 2 :: Views: 1721
Based on the following attached MPS5179 amplifier circuit, I want to design the same circuit for 62MHz. The circuit shown was designed for 38MHz.
The input is 62MHz 15mVp-p and the desired output should be 500mVp-p and V+ = 4V.
What will the value of resistor next to V+ and L2. Will the L2 need to be fixed or (...)
Analog Circuit Design :: 08-02-2005 13:23 :: emax0198 :: Replies: 6 :: Views: 811
I have doubts on power amplifier circuit. I am using RF2117 power amplifier chip, alongwith I have attached the schematic which was given in application notes.
I have doubts on this schematic.
1)What is the purpose of Ferrite inductor? How is it more advantages when compared to ordinary inductors.
2)In the datasheet the output (...)
RF, Microwave, Antennas and Optics :: 12-02-2005 11:30 :: pthoppay :: Replies: 1 :: Views: 1114
in common source cmos amplifier circuit which one is prefarable to to decrease l/w ratio for pmos or to increase the same for nmos for increased performance
Analog IC Design and Layout :: 01-31-2006 02:47 :: shiva :: Replies: 2 :: Views: 1056
im a student doin my final year in telecommunication engin. im suppose to do a 5.8GHz RF power amplifier. its so hard to find the circuit. i have found a 2.3GHz RF power amplifier circuit. i dont know how to upgrade it to 5.8GHz.can anyone help me to find the circuit. i also lacking in the (...)
RF, Microwave, Antennas and Optics :: 09-09-2007 03:27 :: heavenly_shan :: Replies: 4 :: Views: 1619
I face a problem with the amplifier circuit of 5 level multi level inverter circuit.
The main problem is summarized in that i need to drive number of MOSFETs (IRF540N) and I found that if i used an amplifier circuit will be good, but when i tried to drive the MOSFET i got that i need a driving (...)
Analog Circuit Design :: 05-09-2009 14:45 :: Ahmed Waleed :: Replies: 0 :: Views: 1760
what is the function of a transistor in an amplifier circuit:cry:
Other Design :: 07-18-2009 06:13 :: nges :: Replies: 0 :: Views: 1153
i need a guideline to construct a precision amplifier circuit to a motor driver(OPA 541). my input voltage is from -5V to 5V whic from PIC18F4331. Anyone can help me?? pls reply thanks.
Analog Circuit Design :: 08-26-2009 21:32 :: thiam :: Replies: 3 :: Views: 935
Hi, I have attached a picture of an amplifier circuit that I need help solving. Thanks in advance! :)
Analog Circuit Design :: 12-06-2009 00:32 :: zainmz :: Replies: 2 :: Views: 717
Hi, I attached a picture of a circuit I need help solving. This is an amplifier circuit with BJT current mirrors. Any help is appreciated!
Electronic Elementary Questions :: 12-06-2009 10:01 :: zainmz :: Replies: 6 :: Views: 1661
i need a low cost practical ecg measurement circuit diagram apart from AD624AD chip.can anyone please help me?
Analog Circuit Design :: 12-11-2009 02:09 :: divyasasi :: Replies: 0 :: Views: 814
i would like to build 3 lead ecg capturing circuit.. is it possible? how ?
can any one help me in this topic?
Thanks in Advance
Microcontrollers :: 02-07-2010 04:31 :: jineshkj :: Replies: 0 :: Views: 705
I need current amplifier circuit which will provide output 1A to 10A for low current or voltage variation. please provide circuit or ideas
Power Electronics :: 03-04-2010 02:15 :: santhusharu :: Replies: 0 :: Views: 344
I'm builiding an amplifier circuit using resistors and OPAMP(LM741). I already got everything about it, but I'm also asked to waste as little power as possible. Is there any solution for this. It seems like a very stupid question. I'm new to designing analog circuit.
Thanks in advance for any help.
Analog Circuit Design :: 03-09-2010 06:47 :: mmnr00 :: Replies: 6 :: Views: 545
Hey guys. I have a Philips Mini HiFi audio system that is damaged. But the speakers are fine. They are 3200 watt stereo (two speakers) and 1600 watts surround (two speakers) PMPO. Can anyone please tell me how much this power is in RMS? Also, I would like a good amplifier circuit for it including power supply...
Power Electronics :: 06-07-2010 13:50 :: lpkvh08 :: Replies: 1 :: Views: 1261
this is an instrumentation amplifier circuit...here at non inverting terminal of the op amp reference point is connected..what is the use of this point?what happen if i ground this point..help me please..i am attaching this file..
Analog Circuit Design :: 10-05-2010 01:32 :: NARENDRA1234 :: Replies: 1 :: Views: 435
Design a single ended amplifier circuit (single input, single output) with all the bias circuits
to meet the following specification:
1) minimum DC gain is 4000
2) Total current withdrawn from power supply is 250mA
3) Vdd= 3.3 volts
4) Load capacitance is 250fF
5) maximum total on chip resistance (if needed) is 100Kohm
6) BW is to be (...)
Analog IC Design and Layout :: 11-19-2010 16:54 :: iwanttoabsortalltheknowle :: Replies: 1 :: Views: 1201
here is a alarm speaker amplifier circuit , there is two MCU IO pins to driver the circuit to make the alarm speaker sound different alarm voice. But I have two question here :
1. the circuit is made of four transisters. how do the four transisters work?
2. how do I change the MCU IO signal to make the (...)
Analog Circuit Design :: 01-05-2011 01:13 :: hero0765 :: Replies: 2 :: Views: 878
First post so be gentle.
I am need of a amplifier circuit that has the following characteristics:
1uS rise time
250VDC 2ma max O/P
0-5Vdc I/P for 0-250Vdc O/P
I have used the monolithic stuff from MS Kennedy and Apex but
cost and form factor are an issue. The amp is used to drive a
charge plate with a 6' length of COA
Analog Circuit Design :: 01-08-2011 18:56 :: Andrew99 :: Replies: 2 :: Views: 314
Hi,I am looking to build a powerful Electric Guitar amplifier there somebody who can send me circuits about that==:oops::!:
Electronic Elementary Questions :: 01-24-2011 09:16 :: yavolzzz :: Replies: 4 :: Views: 1532
I need a power amplifier circuit for (Ground Penetrating Radar) project, i have a Pulse generator & Crystal osc. with freq.=60Mhz and Multiplier in my project.
I need power amplifier to increasing power before transmitting it through Antenna
Analog Circuit Design :: 03-14-2011 18:48 :: khos :: Replies: 3 :: Views: 769
I need a circuit diagram for an ecg machine that i have to make for a project using Op AMps. The diagrams available over the internet are far too complex and the simulations of those circuits has'nt yielded any favorable results. and i want to be sure that it is a working circuit. Any Help would be appreciated!! *URGENT*
Analog Circuit Design :: 09-28-2011 13:54 :: dlock :: Replies: 5 :: Views: 4076
I'm designing a ecg analogue circuit, i run into problem soldering texas instrument INA321(instrumentation amp) because of its size.
Does anyone know if there is a substitution for INA321 with similar pins and specifications?
Analog Circuit Design :: 10-05-2011 23:58 :: CaptainSpock :: Replies: 0 :: Views: 577
HI i amm trying to answer this question, can anyone help please THANKS
. The company currently has a low noise amplifier circuit for which the LM4136 and the LMC6034 operational amplifiers are contenders. Determine the total noise generated for each and so recommend the best.
Some circuit details are as follows. (...)
Analog Circuit Design :: 02-08-2012 08:42 :: keatescarn :: Replies: 2 :: Views: 369
I need a power amplifier circuit that has to drive a 50W speaker with no IC (integrated circuit) has a transistor and with a pre amplifier on it..
And show the computation of the pre amp if you will ;) tnx!!
Electronic Elementary Questions :: 02-18-2012 01:42 :: pipoyz07 :: Replies: 1 :: Views: 396
i have a pre amplifier circuit.. but i dnt know how to compute it :)) any help?
Electronic Elementary Questions :: 02-29-2012 08:55 :: pipoyz07 :: Replies: 1 :: Views: 294
I have speakers Edifier R100.
Here are the specifications :
I am not satisfied with its performance, the base got too noise when i increase the volume. I want to modify them using any high power amplifier.
As Input Impedance: 10K Ohms , can someone suggest me any high power amplifier c
Hobby Circuits and Small Projects Problems :: 05-15-2012 03:02 :: Jahanzeb1 :: Replies: 2 :: Views: 1102
I am a first year student in electrical engineering.
i'm having a difficulty starting my project which is to design and build a Summing amplifier
that i am assuming... i would appreciate any help :-P...
Design an amplifier circuit so that vo = v a + v b + v c .
Show the schematic and all calculations.
Hobby Circuits and Small Projects Problems :: 11-19-2012 23:53 :: truthteller :: Replies: 1 :: Views: 591
I am trying to construct this amplifier circuit with an LM386 Chip. Can anyone tell me if they see any errors? I cannot get it to work.
Hobby Circuits and Small Projects Problems :: 01-12-2013 15:52 :: McDroo :: Replies: 3 :: Views: 795
Can any body help me by sending a basic instrumentation amplifier circuit diagram using Ad 620 ic.I need a gain of about 100 or below 100.
Electronic Elementary Questions :: 02-13-2013 00:58 :: shibas :: Replies: 3 :: Views: 545
Am in the process of designing a voice trained robot circuit..
For that I've built an amplifier...and it is working well..
(link to amplifier circuit that i built: ... /Lab1b.pdf)
But, now I want to interface MIC to this circuit..
I thought of using i378MV iBall MIC for my applicatio
PC Programming and Interfacing :: 02-27-2013 01:59 :: arivalagan13 :: Replies: 0 :: Views: 282
I couldn't find any realistic circuit drawing also formulas itself. How can I find or construct it?
Analog Circuit Design :: 06-03-2013 17:31 :: Mahmut Bulut :: Replies: 3 :: Views: 345
i am trying to make an amplifier circuit(Speaker Using Transistor BD139). Now calculating Q parameters( I_CQ & V_CEQ) problem with selection of "Beta" From the datasheet I can choose it but Datasheet has the graph(hFE Vs I_C) for V_CE=2V, But my calculating V_CEQ=5.5V. So how can I choose My Beta for Design.
Here the Datasheet Link...
Electronic Elementary Questions :: 06-26-2013 06:54 :: Tutan Debnath :: Replies: 2 :: Views: 257
I have a problem with my amplifier input to gate of mosfet is 2Mhz from microcontroller and bias voltage is 30v.when I measure voltage at the terminal of the dc blockin capacitor as i have given in the following picture it shows voltage low close to zero and the frequency about 300 khz.what is the problem ?Because according to the princ
Analog Circuit Design :: 09-20-2013 11:42 :: rakirajueee08 :: Replies: 3 :: Views: 351
i am a final year student.. i want to make a gsm signal signal booster antenna, for which i have to make an amplifier circuit to amplify the incoming signal,. i also need help in antenna design,, any help will be highly appreciated,,,,
Digital communication :: 09-26-2013 09:53 :: zafran :: Replies: 0 :: Views: 626
I am working with this amplifier circuit attached .When I am giving supply to the circuit my mosfet is getting hot and burning out.Someone can you please suggest me solution for this.hank you so much.99008
Electronic Elementary Questions :: 11-25-2013 03:49 :: rakirajueee08 :: Replies: 3 :: Views: 269
Hi i build a audio amplifier using LM4440 problem is there is a huming sound comming out from the spekr...when i touched the ground line while my feets are in the floor the noise is gone....how can i solved the problem????pls hlp me..thnks.
Analog Circuit Design :: 02-15-2014 13:05 :: debajyoty.roy :: Replies: 11 :: Views: 867
I have a doubt regarding my project.I want to design a Bluetooth based ecg sensor circuit but without uC, :drevil: is it possible to send data without uC? I have seen some topic like that.(I am not brilliant in circuit designing). :-(
Professional Hardware and Electronics Design :: 11-21-2014 08:20 :: Kick :: Replies: 1 :: Views: 177
right leg driving circuit is used for common mode voltage rejection, and represent medium measured voltage which is much bigger than ecg signals and must be canceled (this could saturate the 1'st stage of input amplifier and depend of electrode potential, electrode contact and environment noise). Human body act as a big antenna...
Analog Circuit Design :: 02-06-2005 18:33 :: aNdreiBuuu :: Replies: 10 :: Views: 17233
I am successfully using the attached ecg circuit to get ecg signal.
The problem is that this circuit needs two separate 9V DC batteries - one for the amplifier circuit & other for the isolation circuit (which has an optocoupler).
This safety feature is (...)
Analog Circuit Design :: 08-17-2013 07:33 :: vhha :: Replies: 3 :: Views: 416
i bought a tv tuner card and connected it to my pc
i found certain channels are damn good and certain channel r pathetic. when i asked my service provider he said computer reuiires 80 db signal whereas tv 60 db is enough thats y the picture is bad
i asked to put booster near my house and he said it is not possible as it will cost
Hobby Circuits and Small Projects Problems :: 03-09-2003 23:39 :: snsriram79 :: Replies: 11 :: Views: 3674
:idea: ecg simulator circuit explained.
Other Design :: 08-22-2004 19:03 :: dieguncho :: Replies: 19 :: Views: 30437
plz send me a circuit diagram of an Audio amplifier using LA4440 of 6W *2 channel
Hobby Circuits and Small Projects Problems :: 03-26-2005 13:52 :: soumyajit.s :: Replies: 1 :: Views: 5810