Use A Signal Analyzer To Measure Power Supply, Regulator, and Reference Noise
Oscilloscopes often are used to measure power supply, linear regulator, and reference noise. Since an oscilloscope has a sensitivity in...
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Picotest
Aug 1, 20121 min read
Making Sense of Two-Wire Current-Sense Resistors
Using a simple, but precise test set up, measurements are taken on a 1-m? 5% metal-foil current-sense resistor mounted to a small PCB....
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Picotest
Jul 30, 20121 min read
Low Power And High Efficiency Can Degrade Performance Significantly
The general industry trend is to make electronic products more efficient and, in general, consume less energy. One of the major...
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Picotest
Jun 26, 20121 min read
Understanding the Data Sheet Key to Effective Circuit Design
While the graph of Fig. 1 seems straightforward, there are several issues that become apparent when one tries to make sense of what the...
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Picotest
Jun 22, 20121 min read
Effectively Using the EM-6992 Near Field Probe Kit to Troubleshoot EMI Issues
The EM-6992 Probe Kit includes three magnetic (H) field and two electric (E) field passive, near-field probes and an extension handle...
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Picotest
Jun 15, 20121 min read
How To Measure Ultra-Low Impedances
Maintaining clean, regulated voltage requires more than a high-quality power supply. The power distribution network (PDN)—which, together...
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Picotest
May 31, 20121 min read
Making The Connection Key To Accurate Test Data
We often give even less thought to how we connect our circuits and systems to the test equipment that we use to power and measure the...
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Picotest
May 24, 20121 min read
Troubleshooting EMI: Use Versatile Instrument And Preamp To Search For Embedded Noise
Most engineers do not have convenient access to the equipment necessary for electromagnetic compliance (EMC) or electromagnetic...
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Picotest
May 22, 20121 min read
When Bode Plots Fail Us
It may come as a surprise to some that a control loop’s Bode plot does not always depict the loop stability and that the output impedance...
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Picotest
Mar 24, 20121 min read
An Unconditionally Stable Linear Voltage Regulator
Is it possible to design an unconditionally stable linear voltage regulator? In fact, many believe that most regulator ICs are...
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Picotest
Feb 27, 20121 min read
Extracting Bode Plots from Output Impedance
Many articles and application notes describe the extraction of phase margin, using a non-invasive technique that extracts the phase...
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Picotest
Jan 30, 20121 min read
Are We Focused On The Wrong Reference Parameters?
Designing a reliable circuit that employs a voltage reference requires a more detailed look at device parameters than most data sheets...
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Picotest
Sep 1, 20111 min read
New Technique for Non-Invasive Testing of Regulator Stability
Output impedance is the key to testing filter and regulator phase margin, even when the control loop is inaccessible. Many voltage...
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Picotest
Aug 4, 20111 min read
A Simple Method to Determine ESR Requirements for Stable Regulators
A single, simple measurement is described that allows the determination of the ESR required to achieve a desired phase margin, using a...
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Picotest
Jun 9, 20111 min read
Selecting Test Signal Injectors
A number of test signal injectors are used when evaluating the performance of power supplies and other low-frequency components with a...
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Picotest
Jun 9, 20111 min read
Powering RF and Microwave Systems
RF/microwave design engineers faced with developing effective power circuits for a system require more complete data sheets, appropriate...
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Picotest
May 4, 20111 min read
These Seven Trends May Change Power Design Dramatically
New power semiconductor technologies such as silicon carbide (SiC) and gallium nitride (GaN) promise to rewrite the record books with...
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Picotest
May 4, 20111 min read
An Accurate Method For Measuring Capacitor ESL
With ESL values typically in the range of 1 nH to 5 nH, measuring the ESL of chip capacitors is not a trivial task. At present, some...
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Picotest
Dec 12, 20101 min read
Measuring LDOs requires more bandwidth than you think
Most electronic systems contain at least one voltage regulator, with many systems requiring several regulators, each providing a...
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Picotest
Sep 22, 20101 min read
Deconstructing the Step Load Response Reveals a Wealth of Information
What can be learned from the Step Load response and why we should care? When analyzing power circuits, engineers routinely evaluate the...
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