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Questions tagged [ground-plane]

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3
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1answer
109 views

Shaping ground plane on a 4 layer USB Midi controller PCB

I have asked about this before but I have to admit that I didn't read enough before asking and therefore was'nt able to ask the question properly. I hope I am now. I'm designing a 4 layer board with ...
1
vote
3answers
105 views

Ground Plane Tips for Beginners

I have made a few PCB's over the past few months as I have started to learn about design. All of the circuit boards have been Arduino based, so nothing to powerful. I design them up in Eagle and I ...
1
vote
3answers
142 views

Routing VCC with jumpers?

I'm trying to route a new VHF RF receiver (LO is 151MHz, RF is 162MHz). There's a pair of LC filters on this board, as well as a Si5351 oscillator and a crystal. From what I've read, an uninterrupted ...
3
votes
1answer
179 views

Shield in Inner Copper Layer

I have been designing second version of 4 Layer PCB. The PCB has connectors all over the PCB. In the first version, I had Copper Pour (I call it ...
0
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0answers
45 views

my i2s audio signal is not working. i expect this has something to do with ground and resistors, but i need some help with the details

I am more familiar with software, but I have a project going on that has a tiny amount of hardware involved. I would really appreciate some help with this part. I have existing hardware that has a ...
2
votes
1answer
78 views

Ground plane: is there a tool to identify choke points of a fragmented copper polygon in Eagle?

As they say a picture says a thousand words. Consider this extreme example: You have this copper polygon (a ground plane), but due to other signals routed on the same layer, the polygon comes to a ...
-1
votes
3answers
79 views

Sensor damage, ground loop or something else?

We are testing an capacitive fuel level sensor in field. Its mounted on top of a heavy construction vehicle (colmar) with a 24v battery system. Our sensor runs for few weeks and damages. Every time a ...
0
votes
1answer
65 views

Does a Vcc layer cause noise to a 4-layer RF PCB?

I'm designing a 4 layer GPS tracker PCB with the 2nd layer as ground and 3rd as Vcc. Is this a good practice? I know a gnd layer is good but I'm not sure how to distribute the positive of the supply ...
3
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3answers
879 views

How do I know where to put stitching vias?

I'm working on a PCB that allows me to attach a TSSOP IO expander to a breadboard more easily for experimenting. I asked a question regarding the configuration of decoupling capacitors for an IC with ...
0
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2answers
49 views

does adding Vias through the antenna feed line change impedance?

I have a GPS through-hole patch antenna, the through hole need to be connected to the bottom layer and then from there the feed-line flows to the GPS receiver. But I want the GPS receiver to be on top ...
1
vote
2answers
53 views

How exactly a ground plane helps inproving antenna gain? What is the logic behind it?

How exactly a ground plane helps inproving antenna gain? What is the logic behind it? As per my general understanding, ground plane in reference to any perticular signal trace on PCB helps to absorb ...
0
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0answers
63 views

4 Layer board with high current return path inner layer

So I am doing a layout for a 4 layer PCB 1 ounce/layer. The Chip supports up to 20A (motor controller driver). The application needs about 12 amps max ( I plan it let it go up to 17A in the event of ...
0
votes
1answer
74 views

What is the purpose of this grid on the ground plane near a wifi antenna?

The PCB for this Steam Link has a grid of squares near the antenna. It also has pads for what I guess is either testing or adding 0ohm resisters. What is the purpose of this feature, and why are ...
0
votes
1answer
82 views

Can the USB port's metal enclosure be grounded?

As shown in the image below, the USB port's metal enclosure is touching the copper clad of the PCB (which is a ground plane). Can Bad Things Happen™ if the port's enclosure is grounded? I beep-...
0
votes
1answer
59 views

Split Ground plane with motor drivers

This is a PCB with few stepper drivers. I have a question about the ground plane. I have this idea to split the ground plane for each driver, so, I force the return path to pass through the capacitor....
0
votes
1answer
136 views

Manufacturers' recommendations for ground plane for GPS patch antennas

I see requirements for specific ground plane sizes in many GPS antenna datasheets, but I also see many devices that ship with significantly smaller ground planes. Do these integrators know something ...
0
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1answer
46 views

Issues with designing ground plane for switching relays in high noise environment

I am designing a PC Controlled 8 channel Relay using AVR microcontroller. Here, the relays are on the right side of the board and are controlled by the AVR micro on the left side. The eight TTL ...
0
votes
1answer
71 views

Good PCB Design - Single Power Plane with 2 Power supplies (+ve & -ve)

Recently I've taken over a project which requires low noise but the design given to myself does not meet the requirements. I noticed on the PCB design It has a single Power Plane with 2 separate ...
1
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0answers
44 views

Eagle or Gerber ground plane analysis

I was wondering if anyone knows of a simple tool that gives you something like a heat map that is resistance to ground of different parts of the ground plane in a PCB. What I am particularly after is ...
1
vote
2answers
109 views

Are multiple groundplanes a good idea on a 4-layer pcb?

I'm working on a design of a 4-layer PCB. The stackup is like this: Top: signal Inner 1: power distribution traces and copper fill (VCC) in some areas Inner 2: signal Bottom: ground plane There ...
0
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0answers
90 views

Altium: Via stitching not connecting to plane?

I'm experiencing an issue in altium where my Via stitching vias on the GND net will not connect to my ground plane. Individually placed vias will connect fine through from the top layer polygon GND ...
1
vote
1answer
183 views

PCB multiple ground planes

I am designing a two layer PCB. Two part schematic is shown in attached figures. In the circuit, I am getting four gate signals from FPGA of 3.3V and and error signal, also of 3.3V as inputs and I ...
1
vote
1answer
67 views

Suggestions on soldering through hole large planes

I am small scale manufacturing PCB's I designed for high power actuator and LED control. It is 6"x8", 2 ounce copper and large power and ground planes, with no thermal reliefs. It has a section at one ...
2
votes
1answer
203 views

Ground and earth layers on PCB

I am designing a digital board with USB input and output. Shield of USB is connected to a chassis ground as per USB specs and connected to GND through a R and C in parallel USB power has a common ...
0
votes
2answers
84 views

analog ground and digital ground question

I'm designing a CCD control circuit and have some questions. 1.Should the ground in the 1st and 2nd position in the oval be analog ground or digital ground? 2.If they should be the DGND, whether ...
0
votes
2answers
130 views

Via stitching removes solid ground plane

I read in some places that having a solid ground plane is needed . Does not via stithing causing the solid ground plane to become broken? Is this okay? Also when everyone talks about return current, ...
2
votes
1answer
73 views

Tuning Fork Crystal grounding

This post is very helpful, but I'm still a little unsure about my crystal layout. This is a 4-layer board with top_signal->ground->+5V->bottom_signal stackup. The crystal is a 32.767KHz tuning fork ...
0
votes
1answer
180 views

Extra small RF PCB antenna - GND plane

My new PCB design is about 25 mm * 25 mm, this is not enough for a proper 868 MHz antenna ground plane, I am using the 0868AT43A0020 chip antenna where at least a 20 mm * 40 mm GND plane is required. ...
2
votes
2answers
176 views

What does “minimum etch technique” refer to in PCB layout/design?

in the application hints for an ADC (AD7927 page 26) it says: The printed circuit board that houses the AD7927 should be designed such that the analog and digital sections are separated and ...
4
votes
3answers
327 views

PCB Layout Help (with schematics!) - Split ground plane or not?

Obligatory "not an EE, just a ChemE trying to make some pressure readings for science"! Schematic attached, along with my current layout. It's a 6-channel pressure sensor using MPX4115AP sensors and ...
0
votes
1answer
83 views

PCB power planes and routing question

Ok this is my first time trying some kind of reverse engineering and I have few experiences in PCB testing so it may be a basic question. Basically I am trying to get the schematics for an 8 channel ...
0
votes
1answer
142 views

Eagle help- vias won't connect to GND plane

I'm trying to place some 100W wire wound resistors on my board and I'm going to be using my ground plane and some vias as my heat sink. I have a polygon labelled "GND" on both sides enclosed by a stop ...
2
votes
1answer
149 views

How to connect four different ground planes in the same PCB?

I am working on a project which uses the LTC4020 multi-chemistry battery charger from Linear Technology. The design includes a microcontroller ( NXP KL25Z) to provide additional outputs and ...
0
votes
1answer
107 views

2 Layer PCB Copper Pour on the bottom layer

I am an amateur PCB designer. Trying to design my first PCB. It's a two layer board with ESP8266 module. I have read lot about ground plane and copper pour at the bottom layer. I have tried to use all ...
0
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4answers
391 views

Is a copper pour redundant on the top layer of a multilayer (>= 4) board with a ground plane?

In a multilayer board with a GND plane directly under the top layer, does adding a copper pour to the top layer give extra value in terms of reducing crosstalk and EMI? If all signal traces already ...
2
votes
1answer
793 views

Ground planes on 2 layer PCB

I know there are multiple questions about this topic, but I didn't found an exact answer to my question. My situation: I'm having a 2 layer PCB. On the PCB there are multiple SMD components and ...
3
votes
1answer
254 views

smps and ground layer (4 layer PCB)

I am designing a 4 layer smps (low noise) and I have a some design philosophy questions . Under the transformer (that separates primary from secondary) should I extend the ground planes ( one primary ...
0
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1answer
37 views

Eagle ground consistency

I am designing a two side PCB in eagle. I have placed top and bottom ground pour. After using the autorouter, the ground islands have very little connection to each other, and there are completely ...
1
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0answers
145 views

Sheath voltage limiter grounding of High Voltage underground cable

Underground cables used in substation are normally terminated at pot head. These cables have high insulation with metallic sheath. When cable are carrying high load current a voltage is induced to ...
2
votes
2answers
231 views

Noise issues Atmega power line

I have designed a PCB that has a Atemga328 chip, connected to 6 logic level MosFETs via the PWM lines of the chip. The board is primarily designed to run long lines of led strips. Turning them on, ...
1
vote
0answers
149 views

OrCAD Allegro PCB Designer Ground Plane

i want to assign a black color to Ground Plane (GND 0), it's shape is polygon and it's color is gray like shown on below image, i have two questions: is this a possible polygon shape to implement ? ...
4
votes
2answers
374 views

Power and Ground planes The Henry Ott way or split ground planes

Seeing a lot of mixed infomation around involving ground planes on multilayer boards. For a mixed signal mulitlayer PCB which is the preferred method? I know every board is different and it depends ...
-1
votes
1answer
177 views

Grounding considerations for 2018, and DVdd/Avdd connections [closed]

So, here we go again with the typical "what's the best ground layout?" question. Seems this question has different answers depending on the application, manufacturer, and decade. From what I've read,...
2
votes
3answers
2k views

Eagle: Connect polygons / ground planes

How can I connect polygons 1 and 2 together? It tried to make a trace + vias between them, but Eagle won't let me create a trace on a polygon.
0
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2answers
85 views

What/How many devices to put in one local ground net?

I feel that this is a stupid question but I have really no idea how to answer it. Looking at this answer first part and of course the other answer it's pointing to, I understand that high frequency ...
0
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0answers
69 views

routing to USB3 connector with split ground

Having read through a heap of design recommendations there is one dichotomy I cannot unravel: It is recommended not to route SSRX/SSTX over a split plane. On the other hand, it is recommended to ...
3
votes
2answers
745 views

Connecting Analog and Digital Grounds

I am designing a system that incorporates an FPGA, a few ADCs, and a few DACs. I am curious as to what my best options may be for grounding in my system. The FPGA is on its own daughter board, but ...
1
vote
2answers
407 views

PCB design - Ground fill on every layer? [duplicate]

Im currently working on a PCB design, where I will have 6 layers The stackup will be: Top signals GND layer Signal 3 Signal 4 Powerlayer Bottom signal Right now I have an full Ground ...
-1
votes
1answer
175 views

RF antenna and ground plane

In RF design when antennas are used it is said that the antennas require a larger ground reference.If they have suggested a ground reference and if we are using a smaller one than recommended will it ...
2
votes
1answer
225 views

Are copper pours hidden by default in EAGLE?

I'm looking at the EAGLE board file from the Arduino wiki page, and I feel like I must be missing something - none of the ground pins of U1 appear to be connected to anything: As you can see, the GND ...