1000 Threads found on edaboard.com: Alarm Open Circuit
deos any one know how to set a short and open circuit in HFSS
Electromagnetic Design and Simulation :: 03-09-2005 16:07 :: bouchy :: Replies: 11 :: Views: 2151
Is this correct? Correct me if i m wrong.
In shorct circuit
I= infinity , R=0 , V = ?
In open circuit
I=0 , R= infinity , V=?
Electronic Elementary Questions :: 06-20-2005 01:23 :: huji :: Replies: 4 :: Views: 764
Does IEEE have standards for performing open-circuit Test and Short-circuit Test for transformer and synchronous machine? If YES, pls advise the standard reference code.
Electronic Elementary Questions :: 02-23-2006 23:16 :: powersys :: Replies: 1 :: Views: 3503
can anyone tell me what difference between envelop output(short circuit model) and open circuit model ,when using ptolemy cosimulation.
if selected different model ,will it affect final measurement result??
RF, Microwave, Antennas and Optics :: 04-14-2006 21:45 :: jarod5724 :: Replies: 1 :: Views: 1631
suppose i have "n" number of wire and all are independent to each other which connected to other terminals........ my problem is " if any short or open circuit occur among the wires, HOW WILL WE CHECK THAT?????? just by glowing of DIFFERENT colour of LED
like RED coressponds to SHORT
Electronic Elementary Questions :: 07-26-2006 11:34 :: riku :: Replies: 4 :: Views: 1318
Hi.I want to ask about when a transistor burn what event for transistor
Short circuit or open circuit
And I want to know about d13005
Analog Circuit Design :: 10-14-2007 12:41 :: ebi82 :: Replies: 1 :: Views: 594
I am designing an amplifier
and i have short circuit stubs with different Zo (non of them is 50) and different electrical lenght
and i need to conert them to open circuit stubs
how can i do that?
adding 90 degrees to them doesnt seem to be right
RF, Microwave, Antennas and Optics :: 07-10-2008 22:11 :: 3bweh :: Replies: 1 :: Views: 1264
what happens if the RF output of a RF power amp MMIC (3W 2GHZ) is open circuited?(when rf input is applied)
Is the MMIC PA damaged? or have no problem at this power level?
RF, Microwave, Antennas and Optics :: 11-17-2008 09:45 :: 7rots51 :: Replies: 5 :: Views: 809
It is said in Razavi's analog ic book that a pole is produced in a node, but giving no theory evidence. As an intuitive, I think it is deduced from the open-circuit time constant analysis.
But as I know that method only applies to get -3db pole, not the nondominant one.
So does anybody confire or deny my intuitive? Or give an reasonalbe explai
Analog IC Design and Layout :: 11-28-2009 07:54 :: xuanmulidong :: Replies: 0 :: Views: 762
In transformer two tests are conducted open-circuit and short circuit which one is most preferred.
Power Electronics :: 02-15-2011 06:33 :: encoder :: Replies: 6 :: Views: 6190
I am a novice in RF/microwave. Just learning it for the fun of it. I am currently reading a book called Microwave Transistor Amplifiers by Gonzalez. In the book he states that it is hard to find z,y,h, ABCD parameters for a two-port network because the open/short circuit conditions are hard to implement at high frequencies over broadband. I tried t
RF, Microwave, Antennas and Optics :: 03-25-2011 19:12 :: skilambi :: Replies: 1 :: Views: 1031
Why are open-circuit measurements made on the low voltage side of the transformer, whilst the Short-circuit results are obtained by feeding the high voltage side?
Electronic Elementary Questions :: 08-18-2011 18:08 :: sacko101 :: Replies: 2 :: Views: 2235
How can i measure the open circuit voltage of a battery with the load connnected!
Power Electronics :: 02-27-2012 09:33 :: ujjwol77 :: Replies: 2 :: Views: 1749
what are differences between open circuit QHA(quadrature helix antenna) and short circuit QHA ?
RF, Microwave, Antennas and Optics :: 05-28-2013 01:07 :: redcrystalline :: Replies: 0 :: Views: 198
Hello! What is optimal and safe way to do that?
Classical approach - LO output at the drain, match 50Ohms output line to Zl=-Zout near transistor.
I am going to take LO from gate resonator, so drain port remains unused. Should i match its -Zout to open-circuit, or make "fake" 50Ohm line with 50Ohm resistor and match it to this thing?
RF, Microwave, Antennas and Optics :: 06-27-2013 01:38 :: Terminator3 :: Replies: 4 :: Views: 306
I have a problem with the LTspice ideal model of the transformer , I cannot understand why the current is not null when the transformer is on open circuit.
Electronic Elementary Questions :: 10-07-2013 05:03 :: sooyassine1 :: Replies: 1 :: Views: 233
.. Im looking to build a circuit to automaticly open/close a gate (or) door
with the safety feature not to crush if the door (or) gate becomes obstructed by a person pet, or object
I have searched everywhere with no luck :cry:
I have managed to build one using SR latches and the H bridge with mirco switches used as stop/strart
Hobby Circuits and Small Projects Problems :: 09-13-2006 17:44 :: blogbo :: Replies: 1 :: Views: 3293
Hi, i need some help asap.
I wanna know izzit possible for me to do an alarm without designing a circuit to it?
I mean if i just provide power to the speaker it will sound.
A friend of mine suggest i use 1 thing called 'buffer' but i cant seem to find it in the net.
Electronic Elementary Questions :: 11-01-2006 10:35 :: ClouDxv1 :: Replies: 3 :: Views: 701
what is mean by an open n closed circuit???
Electronic Elementary Questions :: 04-12-2007 11:46 :: mohsin3069 :: Replies: 6 :: Views: 1161
I'm working on a circuit for a 1.5Ω heating element with LED indicators. The circuit would have a 3 stop switch that would allow for on(w/o LEDs), on(LEDs), and off. There would be a green LED lit if the heating element was working properly and a red LED if the element was open.
Its been a number of years since I took an electronics (...)
Hobby Circuits and Small Projects Problems :: 09-17-2010 13:47 :: Kry :: Replies: 3 :: Views: 2010
could any one help me out how to run this is rainy alarm circuit design, when there is no rain my circuit suppose to be open circuited. but my problem is when i open circuit the probe and simulate there is still voltage across the variable resistance, and the variable r
Analog Circuit Design :: 03-15-2011 18:17 :: charick :: Replies: 2 :: Views: 633
I hope someone clever can help me out with this problem as I've spent a lot of times investigated many methods with no success.
I need to accurately measure current to at least 0.1mA and up-to around 150mA in an open circuit with voltages of up-to 1.5kV. To explain this is for measuring electron beam and so the current to be measured i
Analog Circuit Design :: 08-01-2011 11:27 :: Corrado :: Replies: 4 :: Views: 1195
My goal is to have a circuit that is broadband open, with a variable phase angle from say 40 degrees to -40 degrees.
How will you do this with inductor and capacitor?
RF, Microwave, Antennas and Optics :: 08-08-2012 07:05 :: mistyme :: Replies: 5 :: Views: 1112
I have to make a project and one of my tasks is, to calculate the open voltage of the antenna ! If we can say that the equivalent circuit of an antenna in transmit mode is a Voltage source with a Zantenna in a given frequency, i undertand that if i have a Zload=0. this is the open voltage circuit. So I) why is (...)
RF, Microwave, Antennas and Optics :: 03-26-2014 17:08 :: Fovakis :: Replies: 0 :: Views: 236
Do you know how professional alarm system, perhaps by DSC, evaluate the state of the loop?
I'm thinking about their own alarm with ARM MCU and I would had learned by professionals.
According to the manual loop can have the following states:
0Ω (shorted wire, loop shorted) Status Fault
5600Ω (contact closed) Status Secure
Analog Circuit Design :: 09-07-2014 10:43 :: Astrid :: Replies: 4 :: Views: 177
I am designing just alarm clock with89c52.I want to clear doubts following.
1)Can alarm signal from controller directly conect to 12v relay circuit?as i am controlling ac circuit like electric bell.
2)I connect keypad directly to it ok?or i have to connect through pullups?
Microcontrollers :: 10-12-2014 05:18 :: tapu :: Replies: 1 :: Views: 114
for example: op ,buffer,....
Analog Circuit Design :: 10-24-2004 08:05 :: hawkin :: Replies: 5 :: Views: 6044
I faced a weird problem about the bandgap circuit.
I had do many analysis (AC, Tran, DC) about the bandgap circuit, with different
conditions (SS,FF,TT, different temperature, different VCC) , all the simulation showed that the bandgap were stable. But the real chip was unstable. attached are my circuit, and the (...)
Analog Circuit Design :: 05-15-2005 08:13 :: Btrend :: Replies: 15 :: Views: 1406
This is my circuit and i have a quick question. I want to achieve 0V or high impedance(open circuit) at the gate of a N-Channel JFET,Tr2. I have used a NPN transistor with the collector connected to the gate of the N-Channel JFET. when i switch to 5V at base of Q4 the gate of Tr2 will be at 0V and when i switch to 0V, gate of Tr2 is high-Z (...)
Electronic Elementary Questions :: 08-13-2005 17:45 :: circuit :: Replies: 1 :: Views: 1074
Hello, I have a little audio amp that is being designed into a circuit, it has a small 8 ohm speaker in and I need to be able to monitor the speaker for both open circuit and close circuit.
open circuit is relatively easy to monitor, but close circuit a bit harder, Google (...)
Hobby Circuits and Small Projects Problems :: 01-26-2006 06:48 :: cyberrat :: Replies: 4 :: Views: 1065
I have spent last couple of days using Multisim and Google and trying to design input circuit to microcontroller (AVR) with following requirements:
1. Incoming signals: TTL-level pulse sensor, open-collector Hall-sensor and automotive switch-type input (+13,6V - open circuit)
2. Frequency range would be from (...)
Analog Circuit Design :: 02-14-2006 12:43 :: juhhi :: Replies: 1 :: Views: 2185
Hello circuit Only have dependent supplies ;
If i want to find the Thevenin's equivalent circuit from a,b.That is, finding Roc and Vth
my question is: why "Vth' must =0
Thanks a lot
Electronic Elementary Questions :: 02-28-2006 11:24 :: v9260019 :: Replies: 7 :: Views: 5719
Hello ...... the figure shows, I can find the current on the resistor. Can I find the current
througt the voltage sourse??
If cannot ~~~~why???
If using the ammeter in series with the voltage source to measure the current flow through the source~~~ what will I me
Electronic Elementary Questions :: 03-02-2006 07:16 :: v9260019 :: Replies: 1 :: Views: 580
This question is more of a circuit question than that of a math problem it's a simple problem.
I know how to set up the equaiton using the laplace transforms, but I do not know how to set up the initial conidition for il(o-) and vc(o-), and so I'm having problems setting up the equation.
I posted the problem if anyone can help I would reall
Mathematics and Physics :: 03-29-2006 13:45 :: septapus :: Replies: 4 :: Views: 4395
Please give me the DC analysis or any other means and equations related to the DC analysis of the circuit attached below. If possible i'd like to analyse the circuit with Thevenin and Norton Equivalent.
RF, Microwave, Antennas and Optics :: 04-25-2006 05:43 :: pnnavigator0915 :: Replies: 5 :: Views: 709
in a short circuit termination no power is dissipated so all the wave is reflected back to the source. What happens with an open termination ?
RF, Microwave, Antennas and Optics :: 06-23-2006 12:49 :: STOIKOV :: Replies: 6 :: Views: 2088
Why filament of a bulb never make a short circuit ?
Electronic Elementary Questions :: 07-28-2006 15:28 :: my_books :: Replies: 3 :: Views: 1025
can I use some transistor to make a simple circuit to turn on a led indication when the switch is opened? How? normally the led turned on when the swicth is close, how to do in oppasite?
Hobby Circuits and Small Projects Problems :: 12-06-2006 19:35 :: me_guitarist :: Replies: 16 :: Views: 5489
where does the distinction between circuit theory and rf design come,,
is like beyond a certain freq we call it rf design,,
Analog Circuit Design :: 12-21-2006 04:31 :: deepa :: Replies: 2 :: Views: 477
Good day everyone,
I was working with the switching circuit which is provided by IanP.
I encounter some problem with the floating node which is the connection to the microcontroller. As when the microcontroller is off and the power supply connecting the 9V is on it generates a high impedance connection (i.e open circuit) which somehow (...)
Electronic Elementary Questions :: 12-30-2006 21:18 :: zhiling0229 :: Replies: 1 :: Views: 1036
What is the effect of shorting out the capacitor in a clamping circuit?
Electronic Elementary Questions :: 01-27-2007 20:13 :: nathaliep :: Replies: 2 :: Views: 2050
anybody can give me an equation about how to calculate the cutoff frequency of the filter circuit.
how to determine the value of R and C.
I want to have the cutoff frequency of 200Mhz.
Electronic Elementary Questions :: 02-11-2007 23:36 :: ilikebbs :: Replies: 7 :: Views: 13282
Would anyone describe how it is done?
Electronic Elementary Questions :: 03-07-2007 23:09 :: marsvoltaire :: Replies: 6 :: Views: 6733
I am measuring a cable with one end is open....i need to find out the loss of this cable. How can i do that ?
RF, Microwave, Antennas and Optics :: 03-08-2007 08:06 :: MK28 :: Replies: 6 :: Views: 1020
How will you apply KVL for a circuit containing diodes?Please help
Electronic Elementary Questions :: 05-25-2007 08:35 :: sivamit :: Replies: 11 :: Views: 3723
for a simple common source amplifer, why Vdd is also AC ground when doing small signal equivalent cirduit analysis?
Analog Circuit Design :: 07-18-2007 10:28 :: lookforjob :: Replies: 8 :: Views: 1269
I want to use a wide band ~1W MMIC Amplifier,that i must using it's output RF power pin
for DC Supply. Usually i use a Bias-TEE for this purpose but a Wide band Bias-Tee
has about 1~1.5dB insertion Loss.I need to find another solution to avoid that Loss.
(Maximum 0.5dB Loss is acceptable).
My FREQ. Range is 6~14 GHz(this MMIC is
RF, Microwave, Antennas and Optics :: 10-01-2007 06:55 :: memarian :: Replies: 9 :: Views: 5400
Does anyone have the alarm Sounder circuit or who can design it ?
Professional Hardware and Electronics Design :: 02-13-2008 20:34 :: me_guitarist :: Replies: 1 :: Views: 1233
We have an unkown tow-port ciruit. We obtain Z1, Z2, Z3, Z4 by open and short
one of the port. Can we know the impedance of this circuit?
Please see the attached.
Analog Circuit Design :: 05-09-2008 10:10 :: OMEsystem :: Replies: 2 :: Views: 471
How do you troubleshoot,check or test open circuits?
I know you use continiuity to test,check or troubleshoot shorts to ground or VCC to ground but what about testing for open circuits how would you guys test this?
open circuit voltage check? Whats this?
Electronic Elementary Questions :: 05-22-2008 03:04 :: walters :: Replies: 2 :: Views: 2509