Keysight Labs | Power Integrity and Signal Integrity - EEs Talk Tech Electrical Engineering Podcast #19 @KeysightLabs | Uploaded October 2017 | Updated October 2024, 19 hours ago.
How's the impedance of your power plane?
Click to subscribe! ► bit.ly/Scopes_Sub ◄
Check out the EEs Talk Tech electrical engineering podcast:
eestalktech.com
eestalktech.com/power-integrity
Twitter: @DanielBogdanoff twitter.com/DanielBogdanoff
The 2-Minute Guru Season 2 playlist:
youtube.com/playlist?list=PLzHyxysSubUlqBguuVZCeNn47GSK8rcso
More about Keysight oscilloscopes:
bit.ly/SCOPES
Check out our blog:
bit.ly/ScopesBlog
Agenda:
00:15 Kenny helped with Scope Month
01:26 There are 2 different types of power people out there
1: power producers, like wind farms, power plants, adapters
2: power consumers, who care a lot about their power quality. Power supply ripple, etc.
3:03 Power integrity is the study of the effectiveness of the conversion and delivery of DC power from the source to the gates on the IC. - loosely paraphrased
3:45 If Moore's Law hangs on for another 600 years, we'll have a computer that's capable of simulating every single atom in the known universe.
5:00 There were only 2-3 books on power integrity a few years ago
Power integrity has been around since the 1930s
5:50 A product's functional reliability is proportional to the power quality in that product
We're supplying both current and voltage to devices, so Ohm's law comes into play.
A device has both a power plane and a ground plane.
Some power integrity owners include Istvan Novak and Ray Ridley -
they talk about power planes with a flat impedance.
7:15 Flat impedance power planes - If you divide your supply power by your peak current, multiply it by your tolerance, you'll get a target impedance for your power planes.
If one can maintain a frequency flat impedance, the noise on your power supplies will perform much better.
7:55 Go back to circuits 101. An inductor is an open circuit at a high frequency. And, a power plane is essentially a big inductor. For example, when writing high speed digital data to memory, it could cause a problem.
8:40 Printed circuit boards use bypass capacitors to counteract the inductance
10:30 Experienced engineers tend to use intuition when working on power distribution. They use a lot of localized power distribution.
11:15 An SSD has 12 power supplies
A tablet may have 50 power supplies
One of our Keysight oscilloscopes have 180 power supply rails
Some next gen mobile electronics 100-200 power supplies
12:25 There are redundant power supplies spread out across devices to improve reliability. For example, there may be multiple converters that all power the same rail to share the load.
Intuition is used because a lot of people don't have access to good sim tools. They have to use some rules of thumb and over-engineer the device for reliability.
15:10 Kenny has many patents. The Keysight CTO Jay Alexander held the record for most patents at the Colorado Springs site. Kenny has almost 30 patents.
17:15 Kenny began as a probe designer, then got into power integrity.
Kenny recommends a book by Bogatin about signal integrity, and it has a second edition called Signal Integrity and Power Integrity
18:35 SIPI labs - signal integrity and power integrity labs. Power integrity will effect signal integrity, EMI (electromagnetic interference) and EMC (electromagnetic compatibility).
20:10 Many papers say that power supply induced jitter is the single biggest source of data jitter in a digital system.
Kenny has IOT development kits, and it's easy to get them to drop bits. Dropping bits will have an effect on battery life, performance, etc.
21:08 How do you clean up a power supply? The majority of time, it's easiest to use a bypass capacitor. After you've looked at your supply in the time domain, make sure to look at it in the frequency domain. This will help you debug where your noise is coming from. And, if you know the frequency with which you are having trouble, you can work backwards into the right size bypass capacitor
22:42 There are some rules that seem to always apply to everything in electronics. Closer to the device is always better.
Next podcast - wide bandgap semiconductors! The US Department of Energy will pay for engineers to go back to college and get a degree in power engineering. Wide bandgap semiconductors have a huge potential to reduce energy usage.
#electronics #electricalengineering #podcast #engineeringpodcast #electricalengineeringpodcast #power #powerintegrity #signalintegrity #groundplane #powerplane #impedance #voltage #EEsTalkTech #powerengineering
How's the impedance of your power plane?
Click to subscribe! ► bit.ly/Scopes_Sub ◄
Check out the EEs Talk Tech electrical engineering podcast:
eestalktech.com
eestalktech.com/power-integrity
Twitter: @DanielBogdanoff twitter.com/DanielBogdanoff
The 2-Minute Guru Season 2 playlist:
youtube.com/playlist?list=PLzHyxysSubUlqBguuVZCeNn47GSK8rcso
More about Keysight oscilloscopes:
bit.ly/SCOPES
Check out our blog:
bit.ly/ScopesBlog
Agenda:
00:15 Kenny helped with Scope Month
01:26 There are 2 different types of power people out there
1: power producers, like wind farms, power plants, adapters
2: power consumers, who care a lot about their power quality. Power supply ripple, etc.
3:03 Power integrity is the study of the effectiveness of the conversion and delivery of DC power from the source to the gates on the IC. - loosely paraphrased
3:45 If Moore's Law hangs on for another 600 years, we'll have a computer that's capable of simulating every single atom in the known universe.
5:00 There were only 2-3 books on power integrity a few years ago
Power integrity has been around since the 1930s
5:50 A product's functional reliability is proportional to the power quality in that product
We're supplying both current and voltage to devices, so Ohm's law comes into play.
A device has both a power plane and a ground plane.
Some power integrity owners include Istvan Novak and Ray Ridley -
they talk about power planes with a flat impedance.
7:15 Flat impedance power planes - If you divide your supply power by your peak current, multiply it by your tolerance, you'll get a target impedance for your power planes.
If one can maintain a frequency flat impedance, the noise on your power supplies will perform much better.
7:55 Go back to circuits 101. An inductor is an open circuit at a high frequency. And, a power plane is essentially a big inductor. For example, when writing high speed digital data to memory, it could cause a problem.
8:40 Printed circuit boards use bypass capacitors to counteract the inductance
10:30 Experienced engineers tend to use intuition when working on power distribution. They use a lot of localized power distribution.
11:15 An SSD has 12 power supplies
A tablet may have 50 power supplies
One of our Keysight oscilloscopes have 180 power supply rails
Some next gen mobile electronics 100-200 power supplies
12:25 There are redundant power supplies spread out across devices to improve reliability. For example, there may be multiple converters that all power the same rail to share the load.
Intuition is used because a lot of people don't have access to good sim tools. They have to use some rules of thumb and over-engineer the device for reliability.
15:10 Kenny has many patents. The Keysight CTO Jay Alexander held the record for most patents at the Colorado Springs site. Kenny has almost 30 patents.
17:15 Kenny began as a probe designer, then got into power integrity.
Kenny recommends a book by Bogatin about signal integrity, and it has a second edition called Signal Integrity and Power Integrity
18:35 SIPI labs - signal integrity and power integrity labs. Power integrity will effect signal integrity, EMI (electromagnetic interference) and EMC (electromagnetic compatibility).
20:10 Many papers say that power supply induced jitter is the single biggest source of data jitter in a digital system.
Kenny has IOT development kits, and it's easy to get them to drop bits. Dropping bits will have an effect on battery life, performance, etc.
21:08 How do you clean up a power supply? The majority of time, it's easiest to use a bypass capacitor. After you've looked at your supply in the time domain, make sure to look at it in the frequency domain. This will help you debug where your noise is coming from. And, if you know the frequency with which you are having trouble, you can work backwards into the right size bypass capacitor
22:42 There are some rules that seem to always apply to everything in electronics. Closer to the device is always better.
Next podcast - wide bandgap semiconductors! The US Department of Energy will pay for engineers to go back to college and get a degree in power engineering. Wide bandgap semiconductors have a huge potential to reduce energy usage.
#electronics #electricalengineering #podcast #engineeringpodcast #electricalengineeringpodcast #power #powerintegrity #signalintegrity #groundplane #powerplane #impedance #voltage #EEsTalkTech #powerengineering
