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Hi,
I have designed a fully differential (FD) ring oscillator. It has a fairly decent phase noise. I need to convert the FD output of the oscillator to singe-ended (SE). When I use a simple diff pair to do that the phase noise at high frequencies degrades considerably. In other words, the phase...
latch comparator with reset
In a clocked latch comparator, in a half of the clock cycle, the comparator does the comparison. In order words, at the end of that half clock cycle, the results of the comparison is at the output of the comparator.
In the other half cycle, the comparator is reset...
best book for sigma delta data modulators
I was wondering if anybody can introduce me a document comparing the feedback and feedforward structures of delta sigma modulators?
I have read the following two books (Delta-Sigma Data Converters by Norsworthy et al and Understanding Delta-Sigma Data...
Re: LDO stability
Hi All,
I don't agree with this:
Some regulators are stable when the output capacitor is higher than a certain value and some are stable when the output cap is less than a certain value. It depends on the used structure.
If you make the output pole the dominant one,then...
Hspice vs Spectre
Hi Everybody,
I think I have to make it straight for everybody. I have designed Opamp, Bandgap, Regulator, Rectifier and … with HSPICE and also checked the simulation with Spectre, and silicon results.
As you may know, BSIM models are the most accurate models exist for MOS...
planar inductor antenna
Hi Logan,
Here are some application notes and design guides which helped me a lot in understanding RFID systems:
I hope they help you too .
OpAmp
rfid inductor
Hi Logan,
I am not very expert in RFID. But I think it all depends to the frequency of operation. For example in 13.56MHz systems, the tag should be in the near field of the reader. So the principle of power transfer is based on inductive coupling. Thus it is better to say the...
fully diff amp design help
How much is the load capacitance?
How much should be the power consumption?
What is the process technology? CMOC, BiCMOS...
What is the feature size?
Above questions are very important to answer then ask about the amp specs. Also specs 1, 2, 4 and 5 is easily...
Of course, it does matter. Because the above rule is one of many rules that you should satisfy to have a good matching. Common centroid is in addition to the above rule and it is for eliminating first-order temprature and process variation across the wafer.
OpAmp
RFID SIMULATION
since you are going to simulate the whole system simultaneously (which I doubt you can do it) your main problem would be convergence of the simulations. Since your system works at low frequencies, I suggest using HSPICE (but I have also used cadence and pspice but I did have...
RFID SIMULATION
Hi ittefaq11,
Perhaps many of the members of the forum have previously simulated an RFID system. But your question is really unclear. that's why nobody replies. I'm not very expert, but if you answer the following questions maybe somebody can help you:
1- what is the...
Ties
Sure, you can do it. But be very careful about the gates that are directly connected to the pins. These gates are very susceptible to damage because even a little of overvoltage can easily damage the gate oxide. so put an on-chip resistor in series of the gates which are connected to the...
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