Search Engine www.edaboard.com

1000 Threads found on edaboard.com: Noise Canceling
If employing a plastic enclosure for a noise sensitive board perhaps an audio preamp or other forms of preamps and using copper tape for sheilding, does the copper tape need to be grounded to the negative side of a dc power supply powering the circuit? The tape would cover the entirety of all walls inside plastic box. The circuit only has 12v po
I would do a transient analysis with a pulsed current source and a trivial shunt (like 1E12 explicit resistor). I=CdV/dt, use fixed (after initial condition=0) flat-top I, your C(V) is the I/(dV/dt) at the voltage-point of interest; keep / plot V(t) and I(t)/deriv(V(t)), change the X axis to be V(t) instead of time, there's your C-V curve.
Recently made a 12v single supply tda2030 amp and its very noisy. All non polarized caps are 0805 or 1206 MLCCs the board has footprint for 4700uF rail capacitor instead of 220uF - haven't tried 4700uF but circuit with 220uF made noise lots of noise with 2.3R and 8R speakers powered by a meanwell GST60A12-P1J 12v 5A adapter. What can be done to
Hi there I have a situation here regard to the audio amplifier noise. This is the audio source circuit (CODEC) : 153891 This is the audio amplifier circuit : 153892 And here it is the audio amplifier PCB layout : 153893 There are some facts : 1 - With no input to
An anti-alias filter is used if you are sampling the signal, such as for A/D conversion, and the sample-rate is close to 1/2 the maximum frequency of interest. A filter is needed to remove any noise or undesired signals about 1/2 the sample rate since they will be sampled and appear as a lower frequency in the signal band (aliased). The closer th
Hi, 153774 The circuit in the picture is a complementary (NMOS & PMOS) Negative resistance core of an LC VCO. L, C and varactor are OFF-CHIP components connected across pins (IP,IP1B) and (IP1,IPB). The supply is a regulator output VREG and current in the oscillator is determined by resistors connected at top and bottom o
From what I have heard from application engineers, they will only model the main features of the device in its spice model. In the datasheet of the opamp you chose, the main features are low noise, low power, low offset etc which are more likely to be modeled rather than the limited supply range which is not really a feature. If you chose a fancie
Welcome, Plans to design an adjustable power supply based on the SG3525 controller with the possibility of voltage regulation ~ 0-30V and current ~ 0-20A. I have a working power stage, which is able to give over 20A at 30V, while I have a problem with the implementation of the feedback loop. I use an external LM324 operational amplifier wh
Welcome, Plans to design an adjustable power supply based on the SG3525 controller with the possibility of voltage regulation ~ 0-30V and current ~ 0-20A. I have a working power stage, which is able to give over 20A at 30V, while I have a problem with the implementation of the feedback loop. I use an external LM324 operational amplifier wh
Hi, Strange question. Why would I post it on this site if it doesn't work/do what the description says? :) Mainly because of the messy overly crowded wiring I can see. 10uA and presumably low-ish voltages would attract noise pickup and hence errors. Hence my question. Did you ever benchmark it with a more
Hello back, Here is my circuit with high resolution. 153654 Based on inductive noise, short-circuit, ... I have to use optocoupler to isolate my micro-controller from high-voltage. However for Max485 it seems I should connect both GND to each other.
With no electronics knowledge nor soldering skills, you will end replacing the 'turn-off-noise' with smoke. Abstain to guess. Ask them to fix it / reveal any recalls / update design / modification / cures ----> Last resource; install switches that will turn off the transducers before powering off.
Hi Friends, I've got this simple power supply with clean sinusoidal input, but after the bridge rectifier some noise is introduced and I have no idea why, maybe you have some suggestions? As you can see on the left there is a bog standard ZVS driver running at about 40KHz and two secondary windings with bridge rectifier and a smoothing cap on
Hello I'm a bit unsure on how to calculate the input-refered noise for two OTA in parallel. Lets say that both OTA have a input referred noise level of Vn = 60 nV/sqrt(Hz) individually. I have read that if I regard two noise sources connected in series as uncorrelated i can add them. If i connect the two OTAs in parallel and (...)
A REAL oscillator uses circuit noise to begin oscillating. A simulation has no noise so oscillation does not begin. In a simulation you need to add a pulse (a kick) to the input for oscillation to begin. EDIT: Oh, the About Us on the has the owner admitting that he has poor English and a person commenting says the owner is a novi
HI, I'm controlling BLDC motor(Blower) using Half bridge driving circuitry. When running only blower during EMI testing, at 63MHz frequency more EMI noise is producing(6db more than limit). Half bridge driver circuit switching frequency is 30kHz and Gate resistor is 100 ohm. Driver is controlled by microcontroller with 72MHz internal
I am working on 1st order DSM ADC with dc input. my input referred noise is in kVolts whereas output noise is in few nVolts. Can anybody tell me why is it happening?
Hello, my name is Juan Motta, I am new to the forum, I would like to consult them because I have a problem with a Panasonic tv tc-20s10La, I already fixed a problems, but what happens now is that if I turn it off and try to turn it on again, it starts to make a click noise, click and it does not turn on, after several days it turns on. It has burne
Hello, my name is Juan Motta, I am new to the forum, I would like to consult them because I have a problem with a Panasonic tv tc-20s10La, I already fixed a problem I had in the tube but what happens now is that the TV turns on, if I turn it off and try to turn it on again, it starts to make a click noise, click and it does not turn on, after sever
Than you Bigboss for you comment, Yes, I have added a S2P component and added a s-parameter file for my amplifier. It works fine that I can see s-parameters diagrams. But How can I add NF( noise figure) to this component too? If noise Figure parameters are added into s-parameter file, it's OK.You can directly simul