Questions tagged [signal-integrity]
Questions regarding how to properly ensure Signal Integrity, protection from noise, shielding, proper pcb layout.
541 questions
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Can I power an ESP32 from a 2-wire video entryphone without interfering with its signals? [closed]
I want to connect an ESP32 MCU near my garden gate, but I cannot run new wires.
There is an existing 2-wire 24V DC Vimar 40945 entryphone unit, which carries both power and audio/video signals over ...
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Unexpected S-parameter results when measuring input filter damping factor with VNA
I’m working on a task where I need to determine the damping factor of an input filter on a PCB.
The input filter is quite simple:
TVS diode
Reverse polarity protection
Two LC stages with ferrite
...
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Muxing PCIe differential reference clock and Power on the same signal line
We have a case where the Mini PCIe plug-in card outputs a voltage (power) on the Mini PCIe 100MHz REFCLK+ line. This means instead of an input clock signal, this can also be a power output! This is ...
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Is it safe to have power lines gently squeezed against BMS module?
3x 18650 batteries in series inside their compartment. If I want to include a BMS module then due to limitations on available space, my only option is to have the power lines gently squeezed against ...
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Why does the output voltage waveform look like this in the case of impedance mismatch?
This figure is from my textbook. Different impedance values were tried on a transmission line. The plots below show the results.
I don’t understand why the output (second side) waveform looks like ...
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Series termination placement next to receiver
I have series termination resistors very close to the receiver, I have realized that they must be next to the driver (can't be moved since Im using a SOM).
The parallel HDMI input signals that go into ...
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1
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Layer order of a four layer stackup suited to several different high speed digital interfaces
I have encountered a tow road selecting the order of layers in a 4-L stackup. Please consider the pcb has rmii, 2 x usb 2 full speed, qspi, sd card, and a tft controller parallel interface. Several ...
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How to avoid crossing ground/power planes where rigid-flex joins board?
I am working on a design with a 0-5v 40kHz transducer signal that is being rectified and amplified and sent back to an analog front end.
The design is going to use a rigid-flex cable connected to the ...
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10 Layer impedance control PCB stackup for custom SBC
I'm designing a custom SBC using the TI Sitara AM6254 SoC, which includes several high-speed interfaces like DDR4, RGMII, USB,HDMI,LVDS,CSI and PCIe.
The official SK-AM62B-P1 development board from TI ...
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ADC power plane review
I am designing a stand alone board with AD5941. First time I am doing the layout of a board like this. The LDO used for powering the ADC is ADM7155. The schematic diagram of power section is given ...
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SMD capacitors 0603 vs 0805 which one is better for decoupling
I was discussing about decoupling capacitors for ADC in this forum.
One user commented as shown below.
The thing is, the smaller 0603 SMD capacitors have a higher internal resistance compared to the ...
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Voltage amplifier circuit
Before we start, I am a complete newbie and I am not an electrical engineer at all.
I have to synchronize two cameras. One is a Realsense D435 and the other one is an EVK1 HD. The D435 outputs a ...
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ADC can I use 0805 capacitors for decoupling
I designing an electrochemical sensor readout using Ad5941.The LDO used for powering the ADC is ADM7155.
In the reference design all the capacitors and resistors used are 0603 package.In my design I ...
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Request for Feedback – ST7580-Based Long-Distance FSK over Power Line (Master/Slave Topology)
We are currently developing a system based on the ST7580 FSK modem, designed to communicate over a shared power and data line. The architecture consists of a Master device communicating with more than ...
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Is there any way to decrease noise from a wire?
I'm working with a circuit that uses coated micro-quartz tuning fork resonators to detect a gas. When the gas is present, the resonant frequency of the fork changes, and that change is measured using ...
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