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CEPD News
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(303) 415-1112 Broomfield
(970) 541-4777 Loveland
January, 2020 - Vol 13, Issue 1
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CEPD Broomfield and CEPD Loveland Offices
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IEEE Denver Meeting
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IEEE BLOCKCHAIN TRANSACTIVE ENERGY SUMMIT
IEEE Denver Blockchain Local Group & CU
This 2-day event will feature keynotes, tutorials, peer-reviewed technical paper presentations, posters, demos, and exhibitions from world-leading service providers, solution vendors, research institutes, open-source projects, and academia. The Summit is a forum for the technical exchange of the latest research and innovation, regulation, policies, standards, and applications in the exciting and emerging area of blockchain for transactive energy.
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AWS - WHY AWS? (AKA WHY SOMEONE ELSE'S COMPUTERS)
by Jason Legler
Why should you move your infrastructure to someone else's data center? If your infrastructure is already there, why should you move it to "serverless?" This will be a high-level overview of what Amazon AWS is doing correctly, and why you should be using AWS services. It will include demonstrations of some core services, how they relate/compare to "serverless" services, and will hopefully help clarify why you should care. There will be significant QA time to allow for both Questions and Arguing.
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RF Power Measurements and Ohm's Law
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Instantaneous RF power measurements can be tricky. A common technique is to use a high voltage differential probe and a current transformer to simultaneously measure current and voltage with a high-speed oscilloscope. The data can be captured and post-processed, or the measurement mathematics can be computed on screen. There are a few things to be aware of:
1. Verify your load. If you are testing a power amplifier, choose a load resistor which is as purely resistive as possible over the frequency range of interest. The resistor can be verified using a VNA or an impedance analyzer.
2. Verify your polarity. Current transformers (doughnuts) are directional. Make sure you run the wire with hole flow toward the load through the transformer.
3. Verify that there is minimal phase difference. If you see a phase difference between the voltage across your resistive load and the current through it, you have a measurement error! The measurement error is proportional to the cosine of the phase difference. The error could be caused by the introduction of delay in either the voltage or current measurement. Remember that a pure resistance is a scalar, and scalars do not affect phase in multiplication or division. In polar notation:
V∠θ = R∠0 (I∠θ) .
It is not just a good idea, it is the law. :-) DF
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Services
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If you would like help developing a new product or if your projects are understaffed, CEPD can help. Our staff draws on years of diverse product design experience to provide creative and timely solutions for your product needs. Some of our specialties include:
- Technical Project Management
- Embedded Systems Hardware and Software
- Digital Signal Processing (DSP)
- Data Acquisition
- Wireless Sensor and Telemetry Systems (Zigbee, Cellular, VHF, Bluetooth, ANT+, etc.)
- IOT
- Control Systems
- Programmable Logic: FPGA / PLD
- Analog Circuit Design
- Switching Power Supply Design
- Battery Charging (all Chemistries)
- PCB Design and Layout
- Analysis, Test and Documentation
We provide cost effective and expedient design options for our clients, regardless of the project's complexity. Our detailed proposals, accurate estimates and time schedules will help you manage each phase of the project.
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Sincerely,
The Staff of CEPD, Inc.
© 2019, CEPD, Inc.
303 415-1112 Fax 720 306-4445
Loveland Office 970 541-4777
Colorado Electronic Product Design, Inc., 700 Burbank St, Broomfield, CO 80020
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