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53 Threads found on Less Than Zero
hi , I designed conventional single inductor two output dc-dc boost converter in psim. means inductor energy is stored and thrown to 1 output at one cycle and charged and discharged to the 2nd output at next cycle. the two outputs are sensed by using voltage dividers and time multiplexed using analog mux at the speed of half of the switching freq t
Most easily achieved by omitting useless R6. Otherwise must connect a dummy resistor from RG node to ground, e.g. Gohm value.
THe Triac is rated for 600Vp and the motor locked rotor current is (5.02 Amps rms) So the voltage of the MOV must be less than 600V at the rated locked rotor current when the triac is open circuit. The QUestion is, what is the inductive energy stored in a "locked rotor" or motor changing direction at zero speed, when switched off that must (...)
I want a circuit that inputs V volts and outputs V-Vth volts, where Vth is the threshold voltage of a pMOS or nMOS. Is a circuit possible? I tried with pass-transistors, its not happening.
When secondary current falls to zero, there may still be some residual magnetic energy stored in the core which leads to a ringing waveform in the primary. This is a result of having less than 100% perfect coupling between primary and secondary. The looser the coupling, the more likely the voltage waveforms in primary and secondary will (...)
I'm sure there are many ways to solve the problem, but the decision would be always based on detail informations that are missing in your posts yet. You say e.g. the frequency range is 20 to 200 Hz which sounds less than perfect for an ignition unit that should preferably work from "zero" speed upwards. Other points are noise and possible (...)
I got this warning when back annotating an sdf file. What exactly does it mean and will it cause any problems? ncelab: *W,SDFNL2 (,35120|7): The sum of the two annotated limits to $setuphold, $recovery or $recrem timing checks are less than zero for instance :UUTreg , setting negative limit(s) to 0 <...sdf, line 17994>.
This is nothing but just a clock divider code. If the input clock is 50MHz, then the output will be 1Hz, means its a divide by 50,000,000. But there are mistakes here 1. If you really want 1Hz, then you should give 24999999, instead of 25000000, because the counter includes the zero, or you can put the less than (< ) operator instead of (...)
Hi all, Im working on BLDC sensorless algorithm using zero cross detection but i have a weird problem, the back emf appears when duty cycle is 100% is 95966 and with duty cycle less than 100 is 95967 while ideally when phase goes from low to high or vice versa, its in slope form, but it is not th
Each logic family specifies its input requirements to recognize a logic one or zero as VIL and VIH. For example for TTL ViH =0.8v and VIH=2.0v. Any value less than .8v is considered a logic zero and Any value greater than 2.0v is considered a logic one. An input between .8v and 2.4v is invalid. Similarly the (...)
Maybe subtract your desired number (which is 6), then do: BEQ (branch if equal to zero) BNE (if not equal) BMI (if minus) BLT (if less than) BGT (if greater than) The 'branch' command jumps forward or backward the stated number of bytes (in two's complement).
If X is an 8-bit value it can't be more than 255 and a check for less than zero is meaningless if it's an unsigned value so I'm guessing it's an 'int' (signed). It isn't a function in the programming sense, it's a query. It reads as "if the value of X is more than 255 or the value of X is (...)
I think, R4 is intended to achieve safe behavior in case of wire break. I don't exactly understand what you intended by omitting it? The shown TC amplifier is less-than-perfect, because TC respectively wire resistance have a certain effect on zero and scale. It might be a problem either with long wires or very thin TCs that can have up to (...)
How do I know if the accelerometer is 0 degree or 180 degree when they have same output value?You'll get more ambiguities by rotating the accelerometer around other axes. For an unequivocal detection of spatial orientation, you need not less than 3 orthogonal accelerometer channels.
Hi, I have an all-digital design that would benefit greatly from the ability to add fine-grained, in-the-field adjustable delays significantly less than one gate delay (FO4). These delays are not critical to functionality -- if they don't work, the chip won't be a total loss; it will simply underperform. My plan is to include current-starved in
There's a manufacturability gap where you can't reliably pattern below a certain spacing. zero gets merged, any as-printed spacing less than your well depth has a chance of the implant drive connecting them anyway. Then there's the question of just what a narrow-base lateral NPN looks like, to your circuit.
You are best to not exceed the motor current rating as well.. Can you drive with zero Volt by shorting Motor with no Voltage applied then remove short then apply reverse voltage in rapid sequence? The FETs ON resistance ~5 mOhm, if much less than ESR of the motor then most of the energy will be dissipated in the motor., but that may still (...)
The easiest way is to level-shift the pulse train up into the positive region. Attenuate as necessary so it ranges from zero to 5V (or your supply V). Incoming positive pulses will become higher than V/2. Incoming negative pulses will become less than V/2. Idle periods will be at about V/2. You must set thresholds for (...)
hi guys, I am doing a fuzzy based mppt controller for PV array. now from different sources i have seen that the output membership function which is duty cycle is in a range of -4 to +4, now my question is that if we need a value of less than zero as duty cycle to get mppt, then how to use that negative voltage as duty cycle because duty (...)
SSRs often use Triacs or SCRs, not just MOSFETS. You MIGHT be able to design a less expensive discrete solution, but other nice features like zero-crossing, etc. will add complexity. You need to consider the tradeoffs.
Hi vivo_m, This may helps you... there is no other direct function for the same.... if you are using the real number which is less than zero will round as 0 only. there are other method which will consider the decimal part,
Sampling at 2x the maximum frequency does not guarantee signal reconstruction. At best it will detect the presence of the maximum frequency Fourier component , but the amplitude estimation is not guaranteed. It can vary from zero to the actual amplitude of the fmax Fourier component. (depends on the sampling phase, Sampling at less than 2x (...)
For example you are using BPSK modulation, and the bits after decoder is between i.e -0.593 -0.29 etc. So if the symbols are greater than 0, it is 1 if it is less than zero it is -1 this is what we call hard decis. This is same for all coding types if you use BPSK modulation..
For the same power ratings, transformer size of forward converter is smaller than flyback. Output current ripples in forward converter is also less than flyback. In CCM mode, right half plane zero in flyback poses a control challenge.
It takes 1uS for 4 amp to ramp down to zero with 40 volt drive on 10uH leakage, and a further 1uS to ramp up again to 4 amp with 40 volt of drive, you are seeing the net effect of leakage inductance impedance opposing the AC current you are trying to push through the transformer. While the current thru the Tx is less than the current in (...)
Hi there, I would like to impose two condition on a matrix 1. if the value is less than -1, then the value of respective element will be zero 2. if the value is greater than 1, then the value of respective element will be zero I need to do it by one command (I don't want to use for loop since it (...)
hello; How to set a radio button in matlab gui to be automatically change its value property condition? For example: if 1 is less than zero, the value property of radio button will automatically change to "1" if not, the value property of radio button is still on "0" condition Please help me
Hi: I am designing a 2.4GHz PA using AsGa, but the S21 is less than zero. I want to know whether it is normal? thanks very much!!
Think of it as a relay, like it looks. If you don't edit the von, voff properties then it simply closes when the control terminal difference is greater than zero. However changing the properties to make it open / close over a finte range, and have finite nonzero conductance in both states will make it less "ideal" (...)
This does not mean that an unmodulated transmitter signal that is continuously switched on, will not take up bandwidth on the specific frequency part of the radio spectrum. If you switch it on and off, now the signal is modulated (ASK = amplitude shift keying) and the modulation determines the bandwidth. E
The zero mains voltage waveform is more or less meaningless, but it doesn't seem wrong anyhow. The 10V AC waveform shows the output transistor in operation. You must consider, that you won't see a squarewave at this high operation frequency rather than soft, resonant switching. Most likely the waveform shows regular behaviour.
what is pinch off? and why current is not zero if vds ≥ (vgs-vp)? A JFET operates by shutting off an already formed channel between source and drain in the transistor, unlike a MOSFET where the gate voltage creates a channel between source and drain. I think you mean vds less than vgs-vp. The drain to source in
Like the problem is I couldnot get less than 2V when microcontroller is active(that is when inputs are applied). I am using AT89S51. It's output is working on logic zero. I want to get less than 1V to properly operate the relay.
You may want to take a look at: # The purpose of this verification project is to verify an AIS detect DUT. The DUT detects AIS as explained below: # The DUT declares an AIS if there are less than two zero bits in last two sequences of 512 bits in an input stream. # The input stream is recieved via a simple interface: data byte and data (...)
The negative 3 V will be a problem; clamp the input with a suitable diode. The FPGA will "read" the input voltage of more than 2.3 V as a binary 1 and less than 2.2 V as a zero
In the last years, i have found that some antennas with less gain (or size) can equal to a offset dish with bigger gain/size...why does this happens? I give three At just 43cm, this powerful dish offers the performance of an offset 60cm dish. Gain (dB): 33.0"
Sound signal power is not accumulative, means that the pressure would not add more if we apply more sound. So, in this case, if the ambient sound is already 40dB, than you cannot measure sound less than that. Different from light, if you measure the ambient is about 1Cd, a 0,5Cd light can be measure by offset zero the (...)
The two figures are DEFINITELY NOT THE SAME! Figure A has positive feedback greater than unity and will tend to either collapse to the zero current state or increase to an extremely high current state. Figure B has positive feedback less than unity and will tend to go to the expected current state, as long as there is (...)
As far as I know, convergence refers to having a solution which results in an error which is less than the target. In a circuit simulator, the routine is trying to solve for the node voltages while trying to make sure that algebraic sum of currents into that node is zero (Kirchoff's Current Law - KCL). Instead of zero, a (...)
Hello, everyone! I have a level49 bsim3v3 mos model. I use it to simulate some circuits using hspice. But the .lis file shows that fatal: Delta=*** is less than zero when some w and l is used. But other w and l is ok. Could anynoe tell me why? thanks very much! Regards!
Input offset voltage is the voltages aplied to the inputs of OP amp so as to take out zero voltage from the output of it. Normally, it is less than 1 mV, a noise level.
I think RZ is having more BER than NRZ. Manchester is having very less BER compared to other line coding schemes. Regards, tarak
1/(C_OL*L_OL)^0.5 must be less than simulation min. frequency.
can anyone help me to find very low leakage mosfet ? zero gate voltage drain current should be less than 100 na. thanks
For the analog signals, it is easy: the 4-20mA range actually was designed especially to allow you to distinguish a loss of signal from a zero signal. Therefore, if you measure something that is much less than 4mA, you know there is no sensor present (or the wires are broken or shorted). For the digital signals you are describing, things (...)
Can the noise figure of an amplifier be less than unity? as i made ADS simulation of noise, and obtain NF in values sometimes less than unity.. what's its units ? dB or ratio? Also, how can it be less than one?!?!?! thanks in advance, Ahmad,
Mosfet are a active load BJT are the current, but the right one has a less current than the other one.
The structure of the two algorithms are similar, but multiplications in ZF are simpler (one of the terms comes from a small set of values). Their convergence properties are different: A necessary condition for the convergence of the ZF algorithm is that the eye must be initially open (peak ISI less than 1). MSE algorithm does not have this type of
Dear all, I am doing a project titled "Power Modelling of embedded SRAM". There are 2 types of SRAM cells that I need to take care of one is the standard SRAM and the other is the assymetric SRAM cell (where writing a zero is significantly less energy consuming than writing a one). The model should provide an estimate of the power (...)
hi, I need an IC which can perform the following function. (1) Just ONE voltage input, Vin. (2) Just ONE voltage output, Vout. (3) If Vin is less than a threshold (say, 1.8V), Vout is zero. (4) If Vin is larger than this threshold, Vout = Vin. I have considered to use a voltage (...)