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Use A Signal Analyzer To Measure Power Supply, Regulator, and Reference Noise
Noise from the power supply, linear regulators, and voltage references is a major contributor to the limitations of system performance, especially in instrumentation and…
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Making Sense of Two-Wire Current-Sense Resistors
Four-wire sense resistors provide two power connections and two sense wires in order to make a precision measurement. Newer two-wire devices are available in…
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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 considerations is to…
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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 today.…
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Understanding the Data Sheet Key to Effective Circuit Design
Consider this first example excerpt from a datasheet; a plot of the output impedance of a voltage reference with and without a capacitor. Identifying…
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Effectively Using the EM-6992 Near Field Probe Kit to Troubleshoot EMI Issues
Introduction The EM-6992 Probe Kit includes three magnetic (H) field and two electric (E) field passive, near-field probes and an extension handle designed to…
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How To Measure Ultra-Low Impedances
High-speed digital circuits need clean power, but can stress power systems in ways that make it difficult for the system to deliver what’s needed.…
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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…
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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…
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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 interference (EMI) testing. Certified test labs, while…
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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…
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Evaluate Feedback Stability When There’s No Test Point
It’s impossible to directly measure the stability (gain/phase) characteristics of a device if the device’s control loop lacks an access point to apply a…