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The Signal Sped Up
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Applying High Speed De-Compensated VFAs: Hitting Performance Targets while Tuning Phase Margin, Insight #10
The Signal Sped Up  
7/1/2019   Post a comment
Here, some typical applications particularly suited to a decompensated VFA solutions will be shown with phase margin improvement techniques where needed.
Input Impedance Extraction and Application for High Speed Amplifiers, Insight #9
The Signal Sped Up  
6/7/2019   Post a comment
Here, model testing steps will be shown for the VFA then external adjustments to match reported data sheet numbers will be shown
Stability Issues and Resolutions for High Speed Fully Differential Amplifiers (FDAs), Insight #8
The Signal Sped Up  
5/1/2019   2 comments
The most recent VFA FDAs focus on lower power, precision, solutions more aimed at Successive Approximation Register (SAR) and delta sigma ADC support. Those will be focus in this FDA stability discussion - but the concepts are backward compatible to the earliest VFA FDAs.
Stability Issues and Resolutions for High Speed Current Feedback Op Amps, Insight #7
The Signal Sped Up  
4/7/2019   Post a comment
Here, an updated Loop Gain (LG) simulation approach will be first detailed and then used to show paths into, and out of, low Phase Margin (PM) conditions for a current feedback amplifier.
Stability Issues and Resolutions for High Speed Voltage Feedback Op Amps, Insight #6
The Signal Sped Up  
3/10/2019   1 comment
Emerging issues and paths to improve the Phase Margin (PM) for VFA stages that have slipped into perhaps an unsuitably low margin condition
Stability Issues for High Speed Amplifiers: Introductory Background and Improved Analysis, Insight #5
The Signal Sped Up  
2/3/2019   1 comment
Probably no single issue faces more high-speed signal path designers (and supplier support teams) than the risk of instability in higher speed op amps and fully differential amplifiers (FDA).
DC Precision Considerations for High Speed Current Feedback and Fully Differential Amplifiers, Insight #4
The Signal Sped Up  
1/9/2019   Post a comment
The more recent Fully Differential Amplifiers (FDA) offer both CFA and VFA versionsThe CFA based versions will also have poor DC accuracy while more recent “precision” VFA based FDAs can provide much improved DC accuracy. Those VFA-based FDAs do come with some added DC error sources beyond the typical op amp terms that will be described here
DC precision considerations for high speed amplifiers, Insight #3
The Signal Sped Up  
11/15/2018   2 comments
This part 3 will progress through the different VFA approaches with Part 4 moving on to CFA and FDA DC precision considerations
Input and Output Voltage Range Issues for High Speed CFAs and FDAs, Insight #2
The Signal Sped Up  
10/27/2018   2 comments
Here, we will pick I/O range options for the remaining two most popular high-speed amplifier types: High Speed CFAs and FDAs
Input and Output Voltage Range Issues for High Speed Amplifiers, Insight #1
The Signal Sped Up  
9/25/2018   Post a comment
Some years back, an excellent blog appeared on EDN stepping through common issues and questions surrounding lower speed Voltage Feedback Amplifiers (VFA). A wider discussion of the unique issues that come with higher speed op amps will be the intent here




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