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1000 Threads found on Noise Canceling
Hi team, I am working on the layout of a mixed signal circuit. I have finished the layout of analog part (basically some amplifiers, and a bias current generator, etc) and digital part (basically clock generator) separately. Can I please ask 3 questions? Q1: I understand that for substrate noise isolation, I should make sure the supply voltage
Thanks, but LC filtering common mode noise is surely more attenuative of it than common mode inductance alone?
I'm working with cadence virtuoso: I'd like to run some AC/noise simulation but in my design I have clocked latches that required a few micro-sec to set the circuit in the proper configuration. How to run the AC simu from a point established after a tran? Many thanks!!!
The key is the relationship between S/N (signal/noise) ratio and the maximum data bandwidth. Search for Shannons theorem. The transmissions you do with the 2.5W transmitter has extremely low bandwidth, maybe only a few Hz, so the S/N ratio at the receiver can be very low, so less tx power is needed. A TV signal requires much more bandwidth, about 5
The bridge resistance stays effectively constant during pressure variations. C9 has no effect on signals. It's probably intended as noise filter, I doubt that it has much effect at all. To predict if the circuit works correctly you need to know the bridge resistance.
Hello, I am designing a VCO at 5GHz and I use an LDO with PSRR ~70 with 1MHz bandwith. I observe that when using M1 and M3 (biasing PMOS) with a small length phase noise doesn't degrade at all but when length is 2u close to maximum length then I have a phase noise degredation of approximately 10dBc/Hz at 1MHz.. Could someone understand why it occu
The choice is often dictated by the minimum input of the signal. Assume you have a simple OTA with a NMOS input pair, then the minimum input voltage is given by the sum of Vgs across your input pair plus the overdrive of the tail current source. Assume you have an overdrive of 0.2V across the tail current course and an overdrive of 0.2V for the inp
Hello all, I am wondering whats the difference between DDS generated chirp and PLL generated chirp's phase noise characteristics in Radar Link budget analysis? It seems many papers reference DDS as a suitable option to PLL but I would have assumed digital signals having more phase noise due to clock jitter etc. when compared to a Colpitt Oscilla
Dear Friends, My fully differential amplifier is a part of readout circuit in which I need to drive ADC with 10-12 bit of resolution. This mean that the output of my amplifier must provide signal to noise ratio in this range or resolution. I do a transient simulation and I apply sin signal at the frequency of interest under unity gain connect
Hello, I am designing a 5GHz LC tank VCO and it shows -89dbC/HZ @1Mhz phase noise..Which are the best techniques for making it acceptable?
Input Stage Pair ( first CS+CG) should be matched for Minimum noise Figure, other should ( Second CS+CG) be matched for Maximum Gain (Conjugate Matching). Be careful about Stability Factor and a Matching Circuit is not used between CS and CG.( due to well known natural reason )
Constant-current operation makes less ground noise on switching edges, whose ringing can make random or cyclostationary phase noise. If trace impedances are low and traces short, CML can be one of the fastest logic interfaces. However CML is not exactly standardized, meaning you have to own both ends (or get lucky). On-chip, probably a w
"It depends". Much jitter is injected from the power / ground nets, across the edge risteime as a voltage->time transform. Fast edges accrue less jitter per supply deflection (but also impose more internal noise on those rails, and the localization of noise is a thing, as the noise creators are going to differ with local (...)
Hello, I have 2 very annoying issues regarding audible noise evidently entering through ground. First one is the classic: 100Hz hum. I reduced it substantially by using shielded wire for all the air wires, but it still reappears when any high power mains device is turned on (e.g. electric kettle or vacuum cleaner, both 1800W :bsdetector: ) I ha
I want to filter output of my full-bridge class d power amp. I'm trying to connect an ideal differential op to class d output for simulation. But class d output through ideal differential op , growing noise floor(5~10dB). I suspect that problem is incorrect op/filter connection. (pic. A) 151821 pic.A First, I'm mapping
Hi every one do you know , if I have curve of PER(Packet error rate)vs SINR(Signal interference to noise), how can I write and fill the MPR(multi packet reception) matrix?:cry::cry::cry:
I am designing a block named MDAC (multiplying DAC) which is an integral part of a pipelined ADC. now the basic functionality of the block is to find the difference of input and quantised data (i.e finding quantisation noise) and then amplify the same. Obviously it is a fully differential structure. now I have to check the stability and transien
Build any tape of the oscillator, how the noise, especaiily the 1/f noise influence the jitter of the output waveform? Any equation or paper? Thanks.
Hello I am designing an Integer N PLL. For the phase noise of the entire PLL, which method is more efficient. 1. By using PSS and Pnoise simulation in spectre or 2. By using MATLAB code in which phase noise of individual block is used. the formula used in MATLAB code is PN_out = (...)
Hi, once the led lighted with red color and after followed the instructions I provided Exchange the battery with a new original APC one. The result ? It sounds irregularly with a noise intermittent bip. I put a digital tester to reveal the voltage, it is right, more or less V. 12,80 to 13. 10. I already simulated the outage and it supplied the dev