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hi when a load is called active load or passive load? what r the advantages of one over the other? how to know when to use what type of load? Regards
Hi, Can some one pls help me with choosing circuit parameters like R1, R2, C, Vin , f , Vout for designing a common source amplifier with passive load in Cadence. I want accurate graph results for Vin, Vout. Nitya1
passive load are load like resistor and diode connected transistor are active load
I am not sure what circumstances you have in mind, but a lot of circuits have a voltage output so if you want an active load you cannot use a voltage load - the current would but infinite - only limited by spurious resistances. With a current load the power into the load will vary linearly with the output voltage. Another (...)
Post #7 reveals that there's some confusion involved with your problem specification. The sine generator and "sine wave across Rs" requirements suggests a bipolar current source. But how do you want to generate a bipolar current with an unipolar (bridge rectifier) voltage supply? It's also not exactly clear, if you're intending a passive or act
Hi I have to design a passive bandpass filter. I need to do it with the Cauer synthesis. ( i.e ladder network with R and C's). We have to take incount that the source and the load are non-ideal. So the formulas off the transfer function Z21/1+Z11 change into a much more difficult one. Does anybody knows a software tool who can synthese th
Attached circuit is a simple passive filter, It's a Butterworth type or a Chebyshev type? or other type? Could anyone tell me? Could a passive filter be classified to Butterworth or Chebyshev type?
Look for papers by Andrea Ferrero, I think he is the major expert on load pull (both active and passive setup ) in the world. See also:
passive filters do not require any external power like +-15V DC They are made from R L C and transmission lines for the 'electric wave filters' as they were once called. There are many types of passive acoustic and optic filters. I once saw a mechanical acoustic low pass filter for use with telephone handsets. It was for the case of a PWM drive
U must not worry about high active load current. Why do you use active load ? Because u can not implement a big resistor in value with a small passive resistor (poly silicon) in dimention in dimension. This is a trade of. U earn in resistor value with small dimension. But u loss in power consumption. Thanks
who can give some advice?
Dear all I am new in RFID field and begin to study the principle of RFID by reading many books and papers. Here, I have a couple of questions about RFID tag. 1. If a passive tag contains no oscillator, how can it transmit signals at frequency 125kHz or 13.56MHz? 2. I have no idea about the terms "backscatter"and "load modulation", are they th
Are there any difference in phase delay of passive and active filters?
can any one recommend me some reference book or enlighten me on wht effect or purpose does the gnd plane have in a multilayer filter design... in addition is there any books or website have any information on the equivalent circuit of a square resonator and how does it work ??? or radiate???/
It depends on what type of a diode you mean. In most cases (rectifier, Zener, etc.) a diode is, no doubt, a passive device. Only in some special cases like with a tunnel diode, when its negative resistance region is used, it can be considered as an ACTIVE device. Best Regards Eric Note: "an activity" vs. "a passivity" of a device is
This PMOS in LDO can be regarded as a pass transistor of a voltage-controlled current source. As such, it is like having a load-insensitive (ideally) source resistance (which is a passive element but non-linear). Hence you can also regard this a passive.
Hi everyone. I have a question as follow: It is well known that the lossy transmission line will induce non-negligible ISI effect on the transmitted digital signal. When a passive equalizer is employed, the ISI effect will be reduced, but inevitable DC-loss will lower the voltage level of signal. For example, the original voltage level is betwee
Can I have a matching network that can produce matching in the bandwidth of interest while it does not load my previous stage ou of band
Hi all, I'm trying to build a passive volume control between my CD player and studio monitors, but as soon as I dial down the volume, I get hum. I've detailed exactly what I'm doing at . Any help greatly appreciated, All the best, Craig
Please does any reader know how the passive power factor corrector circuit at Figure 1, page 7 of this LED driver datasheet?
I am designing 24- 400V DC-DC stage after that I am inverting to 230V ac, 50Hz, the switching frequency of full bridge inverter section is 50kHz. How can i design LC filter for removing switching haronics to get pure sine wave. can u plase help how to find L and C values.
I am designing a current-mode passive mixer which consists of gm,mixer core and tia stages. The mixer core is ac coupled to the first stage. I wonder about the input offset voltage of tia, is it feedback by the resistor or other ways? I tried to use the feedback resister. The input and output common mode voltage is vcc/2 at most times. (using s
Hi, friends I am designing a passive mixer. When I stimulate, I follow the pdf file” LAB2_Mixer_Tutorial” I have two questions. First: As you can see in the schematic I have uploaded, RF PORT and LO PORT are all paralleled with a 50 Ohm resistor. Why? It is a necessary to add the 50 Ohm resistor? In my opinion, a c
I am designing a passive mixer for a heterodyne receiver. It is a broadband mixer. And after mixing, it is IF=200MHz. And I want to connect a filter behind the mixer. The filter needs 50 Ohm source and 50 Ohm load. In order to provide 50 Ohm resistor for filter, I add a source follower. The follower has gm=20mS. Question: When I connect
how can i do match input and output match for a resisitive mixer? RF signal is a broadband signal here is my circuit: 50 Ohm source---50 Ohm input match---mixer---50 Ohm output match---filter---50Ohm load As the resistive mixer has only 4 mosfet which act as switch, the input impedance is time-variant. How can i estimate the i
Hi I need help in simulating this circuit using simulink.Its a 324 GHz frequency generator Mosfet M1 to M4:W/L=2.4μ/90nm Mosfet M5 to M8: W/L=2μ/90nm Mosfet M9 to M12: W/L=10u/90nm Differential inductor L=.3nH External load ZL=50ohms On chip choke=.2nH All active devices has a frequency of 81 GHZ Only the passive load (...)
That's true that one speed is exactly 3 times the other. May be it was modified in the past but currently it has no gearbox or adjustable pulley. It's still working at the moment, and it's used as a "passive" load (i.e. a generator) to test a permanent magnet brushless motor. At the moment the system is driven at speeds less than 750rpm. I wish to
Does any body know how to measure the lc tank quality factor with software(rf spectre .i.e cadence) and by calculations too? is it possible to get 900 ohm impedance of an lc tank ?(this lc tank was used for an lna load.)( l=5.49nH , c=651fF).the lna has a dc blocking cap of 2pF value after the tank. what is the relation between the impedance, l
Did you try to connect the output directly to the 50 ohm input? If you fear to overload the output, place a series resistor. You didn't tell about required level of the 50 ohm signal, but I expect that you will able to use a passive resistor network and don't need a transistor amplifier stage. Otherwise use a common collector follower as buffer amp
HI, I am not fully aware of load modulation. The concept I know about load modulation is : passive RFID tags communicates and transfers data to the reader by means of load modulation in the LF and HF range. Because of inductive coupling, magnetic field induces a small current in the tag. Since, the reader and tag are (...)
I really doubt it will like a DC input. Often PC supplies these days have active or passive PFC built into them, so without an AC input they may not function at all. If this is not the case, and the PC supply just has a rectifier first and then an offline SMPS, then it might work. As for the voltage rating... hard to tell without knowing exactly
... However,for keypad connection, it runs slow. ... The keypad is a bunch of switches, they don't use any cpu power Alexan_e, I'm different experienced, the keypad model in ISIS is active (has a DLL) so - perhaps - may cause slowdown. I have other problems with it, definitely no
Hi Guys I'm looking for online shop to buy electronic components (active and passive) at cheap price(shop that will ship internationally). Digi-key is the famous for this but unfortunately it is only for people who are doing mass production. Hobbist and small scale R&D people like us cant afford to buy from them due to their extremely high sh
BigBoss, I may sound naive but what the difference the magnitude of signal level will cause to impedance... won't it remain constant under all conditions??? Eventough there isn't any fixed definition about "large signal condition" for a measurement, operating point of an active/passive system is assumed "fixed"
Hi there, I am working on printed dipole antenna array. I an new for XFDTD design, and I really need help. For making understanding, I started to design Microstrip ; one end I put feed component 50 ohms and put passive load 50 ohms on the other end. The result was as I expected. After that, I designed a patch antenna at 2.4 GHz and i
Is there any way to create a passive low pass filter for audio using only inductors (including their cores of course), not capacitors or other devices? - - - Updated - - - Is there any way to create a passive low pass filter for audio using only inductors (including their cores of course), not capacit
Hi, all, In the datasheet of a component, for example, a passive filter, it often plots the S21 over a frequency range under the test condition that source and load impedance are both 50 Ohm. I always wondered, how will the curve change when the source and load impedance doesn't equal to 50 Ohm. e.g. what if the load (...)
Hi, At what frequencies (for 2,4,6,8 layer boards) can I start considering the layout or placement for passive band pass filters, or do component values dictate the placement.
you have a choice of linear passive methods or switching. The passive is easiest, but will generate heat. The switching is more efficient. Whichever method you select, protecting the input is most important. There can be big spikes on the 12 V line when you start your car. Put a pi filter on the input with shunt capacitors of large value a
If this signal is a single tone you can generate it at 4x frequency and use a johnson counter to get the two signals at 1x frequency. Look at Electronic Filter Design Handbook by Williams and Taylor third edition chapter 7 section 5. They have several circuits active and passive. If you do not need good phase accuracy you can make a lumped
I need to design a power supply powered by 9V cell battery to provide a +/- 6.5V dual polarity power supply with max. load curent of about 1A each rail. Is it possible to apply a National buck regulator IC to implement this? If so, how to implement? Or could you suggest me a schmetic for this with selection of passive components in detail?
Hi, I am looking for passive seekers that seek Primery RADARs. This Seekers lock on received signal from RADAR and going toward it, Antenna Types and setup Configurations are my interests. Thanks KMPA
1)What are advantages of active filters over passive filters. 2)Design analog circuit that can generate square and square root of given analog signal of 1v and 100Hz.
Very easy question. The reflected power ! more specifically, the reflected power compared to the incident one, expressed in dB. |RL|=10log(Power Reflected/Power Incident) A little incongruence about the slang exist about an eventual sign. As the nomenclature suggest for a passive device the loss is positive signed. But very often the RL is
There are passive resistive circuits built into cylinders with SMA (and other type) connectors. Some are 50 ohm terminations. Attenuators can also be used for a load. The return loss is twice the attenuation. is an example of some low cost 2W attenuators.
Hi What does the positive gain of 'passive' matching circuit means.
the passive circuit match in ADS
Hello jackie, You mean to say you want a network/circuit terminated port... Then select from The MWO Eleements -> Ports -> Network Terminated Circuit Port: PORT_TN; This is a passive circuit termination that applies a load specified as the port NP of the schematic named in NET. The port number P is set automatically. I modified the sam
czech, If you are referring to stricly passive RC filters, then here are some disadvantages: ~ Can not implement the classic filter types, such as Butterworth, Chebyshev, Legendre, Bessel, etc. ~ Maximum "Q" is 0.5. ~ If you include active RC filters, then here are some advantages: ~ Filter characteristics do not depend on load resistance.
passive Probe for 50 Ohm Oscilloscopes A 50 Ohm passive probe with an attenuation factor of X10 is useful for measuring high frequency signals generated by a relatively low source impedance. A 50 Ohm passive probe will load the circuit being measured with a 500 Ohm resistance and therefore should not be used to measure (...)