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120 Threads found on edaboard.com: Open And Short Circuit
What does physically happen when a receiver antenna in open circuit/ and short circuit mode is exposed to RF signal? Is the power reflected back?
I have a roll of 100 feet of old-fashioned twisted pair telephone cable. I measured the impedance at one end with an impedance analyzer. The analyzer sweeps frequency from 10 kHz to 5 mHz; the frequency (horizontal) scale is linear rather than the more common logarithmic format. The measured impedance is shown on a vertical scale ranging from 10 oh
Hi, A switching open collector circuit has two output states: * high impedance * low impedance (short) to GND. For the first supply a typical open collector is the way to go. For the second one, there are informations missing: current direction and typical voltage. I guess a second open (...)
Hi, A open collector (or open drain) circuit needs a resitor as pullup. The bjt switches to GND, when activated. The resistor limits the current to a safe value and pulls the voltage to VCC when the bjt is not activated. The benefit is, that there will never be a short circuit condition (...)
In filters / matching schematic. For example, if we do not want to add DC block capacitor on drain of transistor, we can use open-circuited matching stub. Also sometimes single-stub matching can be more compact with open-circuited stub and additional phasing line for rotating on Smith Chart. There is my (...)
@1.6GHz you should be able to contrive a simple shorted 1/4 wave stub as the DC injection choke, then cap, GDT and transorb the hell out of the DC end of the choke, that way the RF short circuit at the end of the stub is transformed to an open at the feedline at the operating frequency so the capacitance of (...)
C_mitra mean't was short a pair at one end and make sure you get a short at the other end. If you get an open then make a note of the which wires make your pair up. Change one wire for any other and see if the open circuit stays, then its the unchanged wire. If it comes good (...)
Tina TI nags all the time with error messages :), and you can set some components to open or short, not sure if it always shows what will work or not though. Maybe any of the Spice variations also, as it is the same/ a similar platform.
119728 I simulation cable model circuit for circuit Vsource=30kV AC when C27 have 15kV S1 is short C27 to 0V and open circuit any loop but!!! I don't have plot graph by current C28(2) How any thing sim this circuit? or 0ther program support this (...)
I understood you have to calculate the length L of a coaxial transmission line at wich the input impedance is a short circuit when it's left open at the other side. at a length equal to a quarter wavelength (and it repeats every rotation of pi) an open circuit at a side of a line will be (...)
When you say "shut the circuit off", do you mean open circuit the input voltage or short out the output current? Frank
I understand that you have one model with two antennas, and each antenna is connected to a port. Now you want to simulates the interaction between the two antennas. First you get S21 from the 2-port simulation. Then, instead of creating two additional 1-port EM models (one with antenna 2 shorted, the other with antenna 2 (...)
If a solar panel is open circuit and the sun shines, then what happens to the charge generated, does it charge up and up and blow up the solar panel?
To suppress the ringing after Tx , you may need to short out the transducer with transistor active switch to ground for <1ms , rather than open circuit switch. The tail of the high impedance resonant energy will be absorbed quickly. ( Like a motor/generator brake effect) That should work using one shot or some equiv. cct.
Hi I wish to design a buck converter for charging 12 V and 7 Ah Lead Acid battery from PV panels. My panels are: 21.1 V: open circuit Voltage (Input to buck converter) 4.12 A: short circuit Current (Input to buck converter) I need buck converter of output 4 A, 15 V = 60 W I am using IRF 540 (...)
How do you plan to convert the 3V to 9V efficiently? Is 3V the MPT operating voltage (max power transfer) or the open circuit voltage and short circuit current at max solar input power? I assume you phone uses 9V input down to 6V? Is that a Lithium rechargeable 9V cell? I think a 1N4100 (not IN4100) is (...)
Data terminators are usually 50 , 60,75,93 etc or 120 ohm for coax and twisted pair or CAT5 for single ended. some are not short circuit protected if used to pullup to Vcc. Metal,Film,resistors,usually,fail in open circuit mode. So use two 100 Ohm in parallel and check.
You do not say what current your sagging 12 AC line has to cope with. If you wire the secondary of a low voltage transformer in series with your 12 AC and put a short on the primary of the transformer, you will get only the leakage inductance in series with it. If you open circuit the primary (Beware high voltage), you will (...)
This is called a wired-OR configuration. Only the LOW condition is an active output, where the open drain sink the signal to 0V. This way there is no danger for a collision between HIGH and LOW, resulting in a short circuit. Reading the status there is also no problem With a logical collision, since the unit expecting a (...)
Do you understand the use of the Smith chart for figuring impedance tranformations using transmission line sections? Stub lines are probably most easily understood by considering rotating an open or short through the appropriate angle on a Smith chart (A stub line is just a special case of a transmission line matching section). If you (...)
If a current source has an open circuit (an infinite resistance of its load) then it will try to produce a voltage as high as it can go.
When C3 approaches infinity (high capacitance) it becomes a short , not open. I think there is quite a few things happening in this cct. There will be a series resonance of C1 L1 at about 1.5MHz. There is the parallel resonance of C3 L4 at about 1.88MHz. There are 2 other peaks at 1.2Mhz and 2.3Mhz which are probably from combinations of (...)
I am building a LED panel for my aquarium and need to control the dimmer which requires the following criteria : Power ON with dimming: DIM ~ -Vin >2.5 ~ 6VDC or open circuit Power OFF : DIM ~ -Vin < 0.8VDC or short 100 ~ 1KHz 1mA at PWM dimming OFF and 24VDC input can someone guide me on where to (...)
Impedance of capacitor is 1/jwC . At zero frequency , impedance is infinite and at infinite frequency impedance is 0. So capacitor acts as a open circuit at zero frequency and short circuit at infinite frequency. So AC->R->C acts as a low pass filter and AC ->C->R acts as (...)
I am designing and building device that will work outdoor self-powered using solar panel and battery. Solar panel rated 10W gives Im=0.65A (short-circuit) and has power peak at Um=16.8V (21V open-circuit). The VRLA battery from Yuasa is rated 4Ah 12V (13.65V floating). I (...)
Dear All, How TVS diode Works above certain voltage which we want to suppress? What should be the limit of voltage thet we can apply across TVS? At the time of clamping the required voltage,how we can calculate the amount of current that can flow through the TVS to suppress the excess transient voltage & current? How we can dissipate the energ
As far as I know, you can't simulate a pin diode in HFSS. The best you can do is run two different simulations, one with a short circuit and the other with an open circuit. This is just an initial approximation because there are other parasitic effects that you are not simulating.
I know that this is trivial question ,How do you find whether a circuit is open or short circuited.I have a broken headphone and when I try to find the problem using a continuity test.I have attached my circuit below.Now my question is how to find whether the circuit is (...)
In order to evercome this problem put a zero ohm resistor between two.. Spectre doesn't love something floating,shorted,open circuited etc.
what are differences between open circuit QHA(quadrature helix antenna) and short circuit QHA ?
Class F amp in microwave Design involves a matching network design at the fundamental frequency and load harmonics. The common practice is to present a short circuit at the even order harmonics, and an open circuit at the odd order harmonic. This 2nd and 3rd harmonic is (...)
Why open drain is used in i2c instead of push pull mode
It is very natural that open probes (connected to DMMs)have induced voltage which the meter reads. Once either you remove the probe from the meter's sockets or short circuit the probes, it would read "zero".
Does anyone knows what the ABCD matrices of an open and short circuit parallel stubs are. Regards
Bear in mind that the transformer probably contains a rectifier which could have gone short/open circuit because you are drawing far more current than they are normally rated to carry and also that the transformers internal wiring has to withstand the same voltage that you see as the arc. Consider the (...)
Your circuit involves both drawing and principle design faults. I guess, you meaned to connect the PMOS switch between 24V and VCC pin rather than make it short the power supply, distroying itself. If so, the PMOS switch has to be controlled by a 24V tolerant open drain/open collector (...)
Hello, the picture shows an ideal transformer balun. Normally it shows short circuit behavior to even mode excitation. Is it possible to model open circuit behavior by putting an inifinitely high resistor between the center tap and ground. I am actually wondering because this would be the same as (...)
HI ALL; kindly help me to design a circuit to detect(supervise)the output of audio amplifier. the case is :there is for example 10 speakers concocted to the output of audio amplifier and i need to monitor this line for open circuit or short circuit or amplifier power off . what i (...)
If there is no output current but the meter shows maximum current, it may be because the current sensing resistor is open-circuit.
Take any complex two port passive circuit and compare the open circuit voltage ratio from one side to the inverse short circuit current ratio when driven from the other side and this equality and reciprocity is known as "Tellegen's theorem".
A totem-pole output can drive the output both high and low. If you connect such outputs together there will be a short circuit if they don't drive the same value. You need open collector outputs or similar to do wired-logic.
I would like to see xls (Excel spreadsheet) and/or ods (openDocument spreadsheet) added to the list of allowable attachment extensions. Thanks! J
hi.I want to have circuit which test diode which is short circuit or open circuit or have no problem and I want make this circuit by AVR. please help me
It would be easier to use a ceramic emitter with a current controlled one shot and let it squeal like a metal detector for short circuits and click slowly for leaky circuits and nothing when open circuit.
Always start with a spec. Purpose: Over Voltage transient protection , short circuit to shunt and shutdown for residential AC line, so fast trip fuse or breaker is needed. Failure mode is open circuit after limited number of protections. "CS1-100 surge arrester can work as Class I and (...)
If you use relay then after the short circuit your relay will open and but when it will open and your circuit detects that there is no short circuit so it will close again but actually ur circuit is still in (...)
Given that a transformer as wound can only suffer from two faults :- 1, winding open circuit - test with ohm meter, and 2, windings have a short circuit turn. The problem really is does this transformer suffer from a short circuit turn? A short (...)
Hi, I need to provide a high side load switch for a power supply coming from a battery... i.e. 12V Battery > High side switch> DC voltage at Load rated at 5A The load switch should be able to detect open/short, over load conditions. My question is if I?m using an N channel device then I should use some sort of charge pump driver that will be sw
I read from various literature that a short circuited quarter wave stub is open for AC and short for DC. Can somebody explain the reason behind this?
it's easy If you open the component into the PCBLib library and if you click on the pins you'll see a property called Jumper ID. If you set several pins to same jumper ID (non zero value) they will be considered as short circuit and Altium will not complain if you connect same net to different pins.