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123 Threads found on Signal Ground And Power Ground
Hi, In multilayer PCB layout, it is very common to have dedicated power and ground plane layers during layout. This results in good signal integrity. But in IC layout, I have rarely seen anyone using a particular metal layer solely for power or ground (...)
Along with your 70cm of forward cable, you also probably have a similarly poor ground return. A generic power MOSFET driver could certainly slap that load around, and this might help with duty cycle distortion (which in some logic families might come from the drive strength asymmetry of the outputs). But I'd first (...)
Every time you switch that capacitance you spike either the power or the ground rail and this has to damp out, if indeed it can; ground kicks especially get into all kinds of other things (like your reference voltage, your current sense, etc.) and can initiate large (...)
Hello, I am designing a magneto resistive encoder. For the magneto resistive sensor I am using KMXP5000 sensor, for further signal processing I took IC-TW8 interpolator. The problem I have is the noise in power supply, the noise is only there when IC-TW8 interpolation IC is running, if I reset it the noise disappears. I included the image from
I build amplifiers at times for fun but I always have a problem with them, I get small hums and a higher pitch sound from tweeters, at times I realize when I touch like pots the humming gets higher and if I touch like a speaker wire the humming goes down or stops, I normally wonder if its grounding issues as I don't think I know
Hi everyone I recently submitted a new design for emc testing. Its passed all but the radiated emissions testing. The design incorporates a camera connected to a controller. The camera is powered by 24vdc down a 15 m power cable. When tested for emissions there are some pretty significant peaks in the results. 128241[/AT
:) Hi My Friends... I have a circuit with LM386 Amplifier to amp the signal of VS1003 Left and Right channels. The question is, when i put the headphone cable (example iPhone 4) to the output stage, i dont hear any noise, but when i use another headphone (iPhone 5S) i hear noise of "Hum-Hum-Hum-...". Probably for the old headphone the sensiti
like they said, you have to solve this at the source, not along some 2" long trace. Start with bypass caps right a the chip that is making the signal. 1000 PF in Parallel with 0.1 uF, as close as possible to the power supply pin and the ground pin. that will keep the circulating (...)
Which connector switch Sleeve? You are wondering why DC ground current causes ground noise? with 50mOhm spec @1A or after aging? or with low level signal or with inductive grounds and unshielded connector and signals? (...)
AC supply probably has lots of 100Hz ripple. Measure it with no load and full load signal. Each power amp is probably oscillating above 100Khz causing overheating. If it gets hot with no load, put 2.7Ohm 0.47uF as indicated in specs or similar series snubber on each output to ground. If DC out is not (...)
signal or power diode rated for Icoil is always applied across coil in reverse. This shunts the spike to Vdiode + Icoil* Rdiode (ESR) when switched off. This EMI can be minimized by reducing the loop area of the coil wires using twisted pairs or shlelded pair with care on ground current swing and choice (...)
Why do you need a dual-polarity power supply? ANY AC opamp circuit will work with a single supply voltage if its (+) input is biased at about half the supply voltage and the signal input, output and feedback to ground parts are capacitor-coupled. Here is an example:
Either voltage or current mode bias distribution has its plusses and minuses. With voltage mode you worry about ground offsets and cross-chip VT gradients. With current mode, especially very low currents (hence high net impedance) you worry about signal coupling from digital aggressors and (...)
If Pin 5 does not switch from low to V+, you may have to invert ground contact to create this signal. Cant tell from your description what conditions exist before after power is applied when inserted.
Hi all, As far i know, balanced pcb stackup follows 1. signal layer should have adjacent power/ground layers 2. from center of the board(cross-sectional) top and bottom should have same amount or weight of copper and the di-electrics. If i am deviated from the correct concept (...)
Endcap cells are inserted to fullfill well tie off specifications for the cell rows. Endcaps dont have signal connectivity. They only have connectivity to power and ground distribution in the design. Endcaps have a fixed attribute and cannot be moved by optimization steps. Endcaps are placed (...)
ground and Vcc are the same to a signal because the power supply has a very low resistance and is bypassed with a capacitor.
I have a system where I have sensitive high gain optical amplifiers. The amplifiers has gain around 6M times. In the same system, I also have a wifi module. The construction of the system is such that Wifi - module (TOP) ------------------ Plastic divider Analog Front End (Bottom) The AFE picks up wifi during receive. The AFE doesn't go up
Hello sir, I want to make a wireless audio transmission circuit , Not with very much components but need a simple n easy one to get the motive I have my audio signals ready to fed-in so need no audio transformer or something like that Already i ve seen some headphone circuits its getting to expens
The question doesn't seem to make sense, you have a floating input source, so you can make either positive or negative output your common ground, which simply "combines negative and positive rectified signal".