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33 Threads found on Non Linear Diode
Obviously the circuit can't work without a diode bias current. Due to non-linear diode and transistor characteristic and temperature dependency, it's effectively useless as current sense. It could possibly work as overcurrent detector. Dedicated high side current sense amplifiers are relative cheap and have hard-to-beat (...)
Note that a limitation of the Superposition Theorem is that it must involve all linear devices: You should not use superposition theorem for this because diodes are non-linear devices. However, since both diodes are on in this case and the diodes are ideal diodes with no (...)
Is there any waste in energy by rectifying it as you've shown? I mean what happens to that other half of the wave? I think a single diode can be better in some cases. Basically you have a linear motor with a non-linear load which will result in poor efficiency with a prime mover being some external oscillating for
Theoretically they don't have reverse recovery (no minority charge carriers), practically they have non-linear junction capacitance which causes a current waveform that isn't very different from a bipolar junction diode. See also this previous thread
You may consider Apparent Power to be leading or lagging and that p.f.=Real/Apparent Pwr. as the effective utilization of power which is the same for both scenarios. Motors are the biggest loads with lagging current and apparent power. non linear loads such as diode cap rectifiers are leading pulsed currents and have low p.f. and lots (...)
We call any semiconductor an "active" device not just because it amplifies but because they are voltage or current control devices that may be linear or non-linear depending on bias , polarity and range. diodes are also active and used primarily as switches in logic or clamps to suppress overvoltage or reverse blocking (...)
Before you start to test linearization algorithms (I assume, it's a kind of adaptive pre-distortion) in Simulink, you should verify your mixer models. I'm not familiar with the RF toolbox. Basically non-linear diode characteristics and harmonic analysis (e.g. by FFT) should work for your purposes. Apart from your special (...)
there should have no S-parameter defined over non-linear networks, S-parameter assumes pure passive linear network. You will have >0 components and out-of-input-freq-range components if you calculate your S-parameter in the traditional way. I don't believe this statement is correct. In what definition of S-Param
I need to design a single balanced mixer at K band using shottky diodes. I have find some available diodes, to use at this frequencies such as: Skyworks DMK2790 In the Data sheet there is a SPICE model parameter (Fig. 5 table 3) In ADS I created a file with the
The currents in the diodes of a subharmonic mixer are different than the currents in a standard fundamental mixer. As such, the equations for the mixer operation do change. For instance, an antiparallel diode mixer will enhance some harmonics and intermods, while degrading others. But if you are using a modern (...)
He might be asking what kind of non-linear loads exist. About Good Time, maybe he was trying to say Good morning.
singboon, Regarding your comment on power supply filters performing without the aid of a series resistor: The formula for cutoff frequency depending on a series resistor is based on linear circuit theory. A power supply filter has highly non-linear circuit element(s), the diode(s). In this case, the capacitor is used (...)
If you use it as a switch, do you need the nonlinear model? From the s-parameters in the datasheet, you could create two s2p files for "open" and "closed" state, with the appropriate current/reverse voltage.
There are several options: as indicated above, you can use any non-linear device like a diode or a transistor and adjust it to generate harmonics, then use a filter to reject all unwanted harmonics. One interesting device is a parametric tripler, using a step-recovery diode. Such tripler often operates over a narrow (...)
They don't give the same output. Basically, the rectifier diode with filter capacitor forms a non-linear circuit. It e.g. converts a sine in something like a triangular waveform.
diodes are very non-linear. You are probably generating some DC voltage, but it is microvolts and you do not see it. You need to use an "RF" diode, probably a "zero bias" one to use with an antenna. You need a capacitor at the output that can pass DC volts, but block RF energy from travelling down the wire to the (...)
LED is not a resistor, is a diode that is a non-linear device. The current flowing through it increases exponentially with the voltage across it. To connect it to a power supply you need an external resistor that limits the current at the wanted value. If you know, from data-sheet, that at a voltage drop (across the LED) Vd the current will (...)
When we speak about the "resistance" of a diode we always have to remember that such a semiconductor is a strong non-linear device. That means we always have to distinguish between the STATIC resistance (ratio of dc values) and the DYNAMIC (i.e. differential) resistance (ratio of small changes around the bias point, slope of the V-I characte
Beenish, one additional remark (I forgot to mention in my former posting#4): Multimeter measurements of the diode resistance gives you some rough information about the static dc resistance only. Don't forget that for each non-linear device you have to distinguish between the static and the dynamic (differential, small signal) resista
Hello, I have a problem in modelling a non-linear capacitor. Lets say that the capacitance is changing due to vibrations and which is continously happening. Suppose I am interested only at this mechanical resonance frequency, How can I model it in ADS? So the crux of the problem is this, 1. Capacitance continuosuly changing due to vibrations
I don't see, how you want to generate a sine wave by integrating a square wave. Obviously, you can expect a triangle wave. Sine function generators are usually based on non-linear diode networks. Low pass filters are another method. LM158JG isn't but a specific case variant.
You may find a zener diode with good tolerance like 1%, but still the zener diode tolerance will be more for whole operating temperature. It would always diffcult to achieve really good performance due to variatio in non linear region of characterstics. It is always recommened to use normal diode in series (...)
Well, it is a voltage varying capacitance, with some conversion efficiency. So in general the shunt mounted diode is going to look like a resistor in parallel with a capacitor. If you model the C(v) curve properly, a non linear analysis program will give you the diode impedance. The impedance is definately a "large (...)
We're into the word meanings again I see. As you've said, in electronics, component is a more generic, global term that could apply equally to an integrated circuit or to a piece of wire. The term device is usually reserved for active devices, components that have a non-linear junction such as a diode, transistor or IC but can also be (...)
Just a suggestion, shouldn't you be using a PWM rather than a DAC. The voltage-current response of a LED like that of any diode is highly non linear!!! Dac wont have such a fine resolution to effectively control LED brightness. Asimov
You can't. HFSS is an EM simulator when diodes are nonlinear components.
I'm using an LM395 (High reliability transistor) as a simple threshold detector. The source is half wave rectified AC (from a current loop) and through a resistive divider into the gate via a 5K resistor to prevent oscillation (per datasheet). The saturation point seems very non-linear as I vary the pot. Coule the diode be the culprit ?
There are a couple ways to make a tripler: 1) antiparallel shottky diodes to generate the 3rd harmonic, and linear amplify after that 2) non-linear element (varactor or step recovery diode) and present the correct impedances/filtering to the element terminals to force it to triple 3) other (...)
Hello, You can reduce the batteries and R's to its Thevenin equivalent. After that use the diode model you like: Ideal, Constant Voltage, Constant V and R drop or any non-linear equivalent. Hope this helps and kind regards!
Active devices have in general non-linear current-voltage characteristics, while passive only linear. diodes are an example of highly nonlinear I-V devices. X'sitor, I've never heard about
It should be related to the non-linear behaviour of diode. non-linear is not our focus in zeland. Zeland is specializing in EM simulations of linear circuits and antennas.
Other way is to swap places of diode bridge and pga. Voltage drop on diodes is betwen 0,4 and 1V and this can introduce non linear transfer caracteristic. Also diode bridge can be obmited if one pin of secundar winding is biased to Vcc/2 and rectifying is done by software.
I wish to simulate a non linear circuit having a tunnel diode. can any one suggest a simulation tool for it? (I read that APLAC provides Josephson Junction but no ideas about tunnel diode.)