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Picotest
Jan 23, 20131 min read
How to Make Higher Voltage Power-Distribution-Network Measurements
Assuming the AC signals in the measurement are very small, the power ratings of the ports limit the absolute maximum DC voltage that can...
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Picotest
Oct 23, 20121 min read
Clock Power Optimization Depends On Jitter Control
Clock-jitter performance has become a top priority among clock, analog-to-digital controller (ADC), and power-supply manufacturers. Why?...
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Picotest
Sep 28, 20121 min read
Assessing Point-Of-Load Regulators Using Non-Invasive Techniques
Evaluating the stability of a Point-Of-Load (“POL”) regulator can be performed using both traditional Bode plot and output impedance...
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Picotest
Sep 27, 20121 min read
FAQ #22: So how does this non-invasive measurement relate to phase margin and gain margin?
We can equate the stability to an equivalent phase margin by assuming the magnitude of the gain vector to be 1 and solving for the Q. In...
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Picotest
Sep 18, 20121 min read
New Injector Supports Testing of POLs
High Fidelity POL Testing with the J2112A The J2112A: Faster, Non-Invasive, and High Fidelity POL Step Load Testing Testing the step load...
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Picotest
Sep 18, 20122 min read
FAQ #21: How do you use the Picotest injectors and the Agilent analyzer to measure output impedance
How do you use the Picotest injectors and the Agilent analyzer to measure output impedance and/or non-invasive step loading? For the...
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Picotest
Sep 4, 20121 min read
Making Ripple Measurements
Making ripple measurements has traditionally been using an oscilloscope. For a number of technical reasons, an oscilloscope, in general,...
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Picotest
Aug 20, 20121 min read
Sharpen Rising and Falling Edges
Wherever you find a digital control signal, you find sharp rising and falling edges that need characterization. These edges occur on...
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Picotest
Aug 20, 20122 min read
Exploring Bandwidth, Gain Margin and Phase Margin in Non-Invasive Measurement
Summary Among the most frequently asked questions regarding non-invasive stability measurement are “How do I determine the bandwidth,...
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Picotest
Aug 6, 20121 min read
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
Jul 9, 20121 min read
Essential Test Adapters for Your Network / Impedance Analyzer
The network analyzer, sometimes referred to as a Frequency Response Analyzer (FRA) is a common piece of equipment in most of our labs...
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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
Jun 7, 20121 min read
FAQ #20: 2 Port Shunt Thru Impedance Measurement With The Bode 100
2 Port Shunt Thru Impedance Measurement With The Bode 100 Below are a few diagrams on how to do a 2-port impedance measurement and have...
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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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