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Hi all, What is the best floorplan of a LC-VCO 12GHZ in terms of minimizing the parasitic inductance of the connection tracks? Should I connect the GM active (-R) circuit just after the inductor legs or just after the capacitor bank ? reminder: Connection tracks = the 2 main top level wide metal tracks on which inductor, capacitor bank (...)
Don't know what you did wrong. I see either 0 V output or 0.6V output when setting UIC option (skip initial transient solution), as expectable. can you tell any other simulator, i am using ltspice, or any online circuit simulator - - - Updated - - - i am getting 0-600mv when
The standard microcontroller's active low reset circuitry comprises not only a pull-up resistor, but also a capacitor and a diode which respectively provide the ability to filter possible glitches on the power bus (such as due to hot plugging the board to the power connector), but also allow the fast reset to avoid unespected behavior of the progra
Underlying topography makes the bottom plate nonuniform (not-flat) and this can affect the dielectric's uniformity, its local breakdown and reliability and perhaps a bit of mismatch as well. If the foundry didn't characterize and qualify the effects of topography-under-capacitor, they will likely not allow it. Not just the active area but the
It appears that one side of the varactor bias is used to bias the active gain device which avoids capacitor blocks thus avoiding additional parasitics.
Accumulation, if it's used / implemented properly, can be a better cap area than inversion. But if you want to use a standard MOS, your bottom plate contact is not the S/D but the body tie (tap) which in many kits is left as almost an afterthought, placed as sparsely as the rules allow. If you made a "depletion MOS" (like, N+ active in Nwell) then
This of course simplifies to a plain old biquad, and we can tap at different points in the loop to pick different zeros to get HP (first order zero), BP (second order zeros) or LP response (no zeros). I've look at 3 different structures and they all work the same way. The insight I'm still lacking is a clear mental picture
The feedback factor is larger than unity if it is not a PASSIVE but an active feedback path (with another amplifying unit). Example: Phase-lead integrator. In this circuit the feedback path consists of an inverting opamp amplifier in series with the integrating capacitor - fed back to the non-inv. opamp termnal. Advantages: The parasitic phase shif
Hi for all with fuzzy controller type 1 i want to regulate the capacitor voltage of un active power filter to make it fixe as well with reference and other side having THD<5% ,i used an inverter NPC 3 level . problem: when i regulate voltage to 600V i can't save the THD<5% then when i saved it i can't regulate the Vdc with reference for th
Hi, I would like to retrieve pulses out of the mains plug, using only passive components and diodes (no active devices). A reverse sawtooth, or alternatively a capacitor discharge pulse curve is desired, not square pulses. If capacitor discharge is used, the sharper the charge dime and the longer the discharge time the better. Could you (...)
Passive or active? Impedance? Voltage? Linear or Switched capacitor blocks or Digital with filter libraries?
You made a mistake in your Zout calculation. In this circuit Ib is not equal to 0A. To find Zout we "short" transistor base terminal to ground. But this "short" is only for AC signal. And this means the in real life we "short" transistor base to GND via large capacitor. So transistor is ON and still work in active region. obrazki.
The Source sells cell phones. Guess who owns them now? Bell Canada of course. There was active Electronics but most or all their stores are closed now. Sayal Surplus Electronics has two big stores in Missiassauga.
This circuit is an undervoltage protection that keeps the capacitor C62, C46, C69, C67 as charged. This is an active protection and works when output voltage goes below some milivolts i dont know whether it can be adjusted. In case of undervoltage situation, these capacitors add their voltages onto the output voltage so that output voltage r
Hello, The active clamp forward can certainly be arranged to have zero switch_on switching loss (by suitable sizing of the leakage inductance). Since at switch off, much of the FET drain current is diverted into the clamp capacitor, (ie rather than it going through the drain_source of the FET) can we also say that the switch_off switching loss
I build a small mixer circuit from, Electronic Projects for Video Enthusiasts, and i want to plug its output into a Nokia 1200 mobile phone. If I connect the mixer output to a bench amp it works very well, but if i connect it to the headset mic, it is very soft. Any ideas, please.
I want to know how the capacitor can be used as a inductor Together with an operational amplifier a capacitor can mimic a lossy inductor - and if you can afford to apply two opamps (GIC configuration) you can simulate a nearly ideal active inductor.
Dear all .. what is the procedure of simulation of microstrip antenna along with the components like resistor, capacitor, varactor and pin diode in IE3D or CST MWS. Can you please send the link for such documents. Thanks
What are you utilizing to power the device? A poorly regulated power supply combined with the Brown-Out Reset (BOR) active can cause the device to repeatedly reset, essentially suspending device operation. I would recommend utilizing a 100nF decoupling capacitor as close as possible between the Vdd and Vss pins, use a well regulated power supply
Hi, someone knows this kind of filter? 92920 I've calculated transfer function with sapwin but now i want to obtain the center frequency of bandpass. Anyone could help me?
where u place the active device is somewhat irrelevant. But you may not want to "directly" attach a gate to a microstrip ring, as you would end up with a very low Q resonator. There is decoupling inherently built in, either with a small value lumped capacitor or a physical gap between the ring and the gate stub. With the proper decoupling, your
R1 is used only for applying external bias voltage Terminals E and B are the active terminals between C1 and R2 When the base trigger level is reached, R2 is switched to C1 with some internal resistance to discharge the capacitor. the emitter voltage will result from C1 discharge current into R2 therefore Ic=Vg/R2=C1 dV/dt R3C1 is most o
active FET buffered Diff probes are ideal ( but also very sensitive to ESD > 25V !) , but you can achieve adequate measurement here using two identical probes and identical short ground leads. < 3". Connecting both probes to the same point of a dynamic waveform should null out on Ch1-2. If not then twist/wrap both probe cables together & repeat
are you designing a microstrip oscillator, or an IC chip? The bigest problem in such things are the parasitic reactances related to the structure. you need some sort of active device (FET or PIN diode) to switch in/out each capacitor, and those devices also require a biasing scheme. All of these things lead to a total reactance vs. frequency tha
Hello. I have to desing and build for my last semester an active harmonic filter. I have desinged it in simulation and now I'm trying to make what happen in simulation real. So here is the problem. Basically many problems. I 've managed to build the control circuit. The basic concept is this: A current sensor gives me the current. This current brin
i want to design a active bandpass filter, Q>10, center frequency f0=20KHz, stop band attenuation as large as possible, and use as small as possible external components, and only one off-chip component is allowed (a R or a C), the other components to be on-chip, what type of BPF can i use? in my opinion, i want to design a two-order BPF, but as i
The articles below were among the hits via internet search. I saw schematics that look like a mix of components and block diagrams. Not sure any of them are working circuits.
Hi again As you probably know , each Rectifier , with capacitor , will make high value of reactive power . hence , you have to use a PFC , after your rectifier and capacitor , it will improve the current waveform , to achieve , cos phi = nearby 1 . So , a boost converter is incredible for it .And as i told you at past , if you need higher (...)
β is proportional to Ib and Tj until limit then β drops quickly and is inversely proportional to Vce near saturation. Both events occur at initial condition. If you get a "ballpark figure" aka a rough estimate on this atypical use, you are doing well. Then after the capacitor charges up, it only becomes active for positive ripple on
Hello, In an active clamp forward converter with a P-Channel, low-sie clamp capacitor, does this clamp capacitor act as a big turn-off snubber, thus reducing switching losses in the main primary side NFET? ......If so, does this mean that switch-off switching losses will be less in an active clamp forward converter (...)
1. I have read somewhere that while in the holding mode, the input common mode voltage of the differential amplifier is equals to output common mode. Does that necessitates the vcmin range should include vcmout? If not what will happen? During hold mode the amplifier is active. In this state the value of the ou
Is there anywhere i can get more information on this? I know that - in some cases - the active and artificial unit "FDNR" is also called "super-capacitor". The impedance of this two-opamp circuit is Z=-1/(D*w^2). (Thus, it is negative and real). In a similar way one could define and realize an active circuit (with
Hello mostafa As i understood , you want measure your load , and then you want change your load . is your load reactive ? or active ? or complex ? As i think , you want make a capacitor bank ? isn't it? Good luck Goldsmith
I think you can change the resonating capacitor in a capacitor bank circuit that consists of different valued capacitors in parallel and hence your center frequency of selective resonant circuit is changed. Or, you may also use active device if you frequency is not too high to build bandpass filter with sliding (...)
i have read circuit theory and use of network theorem branch current analysis mesh current analysis Norton's theorem Thevenin's Theorem these all use for purely passive component such as resistor, capacitor, inductor the problems for me that how to use these theorem for active component such as transistor, diode
L1 and VC1 (Variable capacitor) make the tuning circuit to get signal of the radio stations' transmission and the received signal is amplified through Q1 amplified by Q2 and fed back to the tuning circuit (regenerative circuit, some times known as Autodyne, too, regenerative means amplified many times by the same active component, here the Q1 and Q
1. Put 0.1uF capaciton on 5v supply very near to mcu pins. 2. If watchdog timer is active and not cleared in software. 3. software
Hello, Many of the active PFC IC datasheets show a DM capacitor (often indicated by C_in/C_filter) following the bridge rectifier to filter out the high frequency noise. How is this capacitor value to be selected? And what will happen if one goes for a larger value of Cin? (usually small values around 1uF are
Any first order RC lowpass combination (active or passive) can act as an integrator if the operating frequencies are large if compared with the lowpass corner frequency (at least a factor of 10 as a rule of thumb). WHY? Because for high frequencies the phase shift approaches 90 deg. (ideal integrator: exact 90 deg.).
Hi Maryam, At first you should specify the order of filter ( How much rejection, do you need in certain offset from center frequency? by knowing that, the order of filter can be found). Also there are several types of Filters such as butter worth, chebyshev and etc. Each type has certain properties. By assuming that you have found the desir
Hi,As we know,in a gyrator active inductor,L=c/gm?. If we choose a capacitor value as small as possible,then the gm becomes small too,so the power consumption is small,which gives both area and power reduction. so my question is how to choose gm and capacitor value in reason?
The only passive devices that can be "nearer the bond pad" in the vertical sense are the MIM capacitor and Metal Inductor. Depending on how close is close, these devices would not care. Resistors, PIS capacitors, MOSFETs, BIPOLARs, varactors, etc are all close to the silicon surface. At technologies < 0.22um, they are at and below the silicon surfa
Hello I am getting problem in my circuit can anyone help me.I have used coupling capacitor to couple active inductor as a load but here due to parallel resonance (i think in wire which is connecting coupling capacitor to the input stage) in S21(gain)plot i am getting peak at lower frequencies (in MHz) also but actually (...)
I would suggest an analog filter. Look at TI Filter Pro. active Filter Design Application - FILTERPRO - TI Software Folder . Keith.
The gate capacitance of the device will hold a voltage for a while (the same as any capacitor will), as long as there's not a low resistive path to ground. The gate capacitance at the input of source followers are used to sample and hold the coltage from a phododiode in CMOS cameras (active pixel sensors). I hope this is clear.
I am in need of two solutions manuals for the following textbooks: 1. Design of Analog Filters, by Rolf Schaumann 2. Design of Analog Filters, Passive, active RC and Switched capacitor by Rolf Schaumann, S. Ghausi, K. Laker Thank you all,
I am in need of two solutions manuals for the following textbooks: 1. Design of Analog Filters, by Rolf Schaumann 2. Design of Analog Filters, Passive, active RC and Switched capacitor by Rolf Schaumann, S. Ghausi, K. Laker Thank you all,
During startup the clamp capacitor is gradually built up to Vin/(1-D) assuming a low-side active clamp. I assume the clamp capacitor is being charged with the magnetizing current of the transformer. During startup, the magnetizing current's up slope should exceed the down slope. Otherwise, the clamp capacitor's voltage (...)
Hi all, Im doing a project on Li-ion cell balancing. The method im doing is active cell balancing with a capacitor. Im trying to simulated it in Spice and MATLAB simpowersystems, but there is a fundamental problem with the circuits(because i tried in two environments). Some thing is changing too rapidly in the schematic. The problem is usuall
At those frequencies, a Chebycheff or Cauer type bandpass filter within an amplifer will be very proper.You can change the capacitor values by switching CMOS transistors that are digitally controlled.For more information, see active filter design methodologies.For inductances, you can use bonding wires and so you get L-C components.