Most engineers do not have convenient access to the equipment necessary for electromagnetic compliance (EMC) or electromagnetic...

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...

Fortunately, a new technique permits non-invasive stability testing of such devices.1 Designers can evaluate stability by measuring (on...

The resistor being measured is a 250uOhm 1% resistor manufactured by Stackpole. The datasheet is not clear about how the device...

Is it possible to design an unconditionally stable linear voltage regulator? In fact, many believe that most regulator ICs are...

Introduction Most of us have experience using a wideband signal injection transformer to introduce a modulation signal into our loop...

What is the difference between a Frequency Response Analyzer (FRA) and a Vector Network Analyzer (VNA)? The FRA is generally designed to...

One characteristic of Op Amps that limits the performance of low noise and precision circuits is PSRR. The output of the Op Amp is not...

What injection resistor value should I use? Is it okay to use a little larger resistor like 30 or 50 ohm instead of 5 ohm (like many app...

Many articles and application notes describe the extraction of phase margin, using a non-invasive technique that extracts the phase...

There are cases where a Bode (gain?phase) plot cannot be obtained from a control loop. For example, a three terminal regulator or hybrid...

Designing a reliable circuit that employs a voltage reference requires a more detailed look at device parameters than most data sheets...

In this article we examine the process of measuring a key performance characteristic, output impedance, using the Picotest J2130 DC Dias...

In this article we detail the process of measuring a key performance characteristic of voltage references, power supply rejection ratio...

The measurements are performed on the Picotest Voltage Regulator Test Standard (VRTS) testing board1 which comes with the regulators...

Output impedance is the key to testing filter and regulator phase margin, even when the control loop is inaccessible. Many voltage...

A single, simple measurement is described that allows the determination of the ESR required to achieve a desired phase margin, using a...

In this measurement the J2130A provides a DC bias to the Optocoupler LED, which returns to ground through a termination resistor. The...

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The measurements are performed on the Picotest Voltage Regulator Test Standard (VRTS) testing board1Picotest. Click here to read the...