Questions tagged [ground-plane]

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PCB Layout - Ground Plane Clearance Around and Under Ceramic Resonator

We are using Murata's 4MHz Ceramic Resonator (CSTCR4M00G53-R0) in one of our designs and request help in PCB layout design around Ceramic Resonator. The below Murata's FAQs page suggests not to place ...
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0answers
808 views

Conductive or insulated motherboard-standoffs?

AFAIK it's common practice to mount an ATX motherboard to conductive brass standoffs inside the case. There are even metal traces around the screw holes to provide contact between the screws and the ...
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0answers
363 views

Top layer ground flood on 4 layer board - how should the ground planes be connected?

I have a 4 layer board, with inner layers being power and ground. After laying out the components and completing the tracking I do a top layer flood as an additional ground plane. How should the two ...
2
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1answer
284 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 ...
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2answers
46 views

How to connect multiple ground pins in a FFC connector

So I have a bunch of these FFC connectors shown here, and a lot of the middle pins are actually ground pins (highlighted in green). I have a multi-layer board, so I want to route all these grounds to ...
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0answers
63 views

Connected ground planes from different power sources not working

I made a simple uC (8266) based schematic that controls some peripherals. It is powered via 12v ac-dc power supply connected to the lm2596: PCB1: The uC has uart connector like that: PCB1: This is ...
1
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1answer
135 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 ...
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0answers
237 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 ? ...
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0answers
766 views

PCB Ground and Power Plane Design Guidelines

I am converting a design from through hole components to SMT components. The schematic is identical, except the maximum allowable current through an onboard relay will be halved from 20A to 10A. ...
0
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0answers
60 views

Ground Planes, 0v or GND?

I have a board that has a dual voltage isolated DC-DC converter on it. The converter takes 0 an 5v in and gives -5,0,5 v out. The 0v of the input is actual ground. Most of the PCB uses the isolated ...
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3answers
80 views

Power planes in PCB

I'm designing my first PCB (two layer), the project is for an amplifier based on OPA2134. The design/amplifier requires to have +12V, GND and -12V. The power for the amplifier comes from a ...
0
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1answer
35 views

Ground separation between ADC and high current capacitor discharge circuit

I recently designed a capacitor discharge welder for my welding applications, and I come through a problem about separating grounds between AGND of the controller and (-) terminal of the big 1.3 ...
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0answers
57 views

PCB Ground Plane on Two Layer High Signal Density Board

To give an overview of the design. I am creating a PCB with a header connection for raspberry pi that will use RPI I2C capabilities and GPIO to control board mounted integrated circuits whose outputs ...
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28 views

Connecting Ground Paths

I am using a stm32f407vgtx to control full bridge drivers which drive a H bridge of 4 N-channel Mosfet. I don't have any idea about grounding. I am thinking of using two separate ground AGND (ground ...
0
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1answer
76 views

Multiple ground planes, single point ground, and a level shifter

I'm using a level shifter to go from 3.3V to 5V (digital/analog). According to the datasheet, if I put 1 ground on the left side of the IC and the other on the right, it would tie the grounds together ...
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0answers
77 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 ...
0
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1answer
86 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 ...
0
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3answers
185 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 ...
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0answers
88 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
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1answer
67 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....
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1answer
295 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
58 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 ...
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0answers
361 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 ...
0
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1answer
369 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. ...
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1answer
248 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 ...
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2answers
212 views

Ground Plane for Motors

I'm making my first PCB and would like some advice about ground planes. The pcb it two layer, and all parts are through hole. Bottom layer consists of all the ground pads and everything else is on the ...
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0answers
145 views

Oscilator grounding on mixed signal PCB

I have a DAC using MCLK from an oscillator. All literature that I read suggest to ground it to analog ground. However the output of my DAC (analog output) is also close by and I am afraid that my (...
0
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1answer
156 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 ...