REGISTER | LOGIN
Home    Bloggers    Blogs    Article Archives    Messages    About Us   
Tw  |  Fb  |  In  |  Rss
Applying High Speed De-Compensated VFAs: Hitting Performance Targets while Tuning Phase Margin, Insight #10
7/1/2019

< Previous   Image 9 of 23      Next >

Figure 4
Click here for larger image 
Gain of -2V/V inverting compensation using the OPA838.

Click here for larger image

Gain of -2V/V inverting compensation using the OPA838.

< Previous   Image 9 of 23      Next >

Return to Article

More Blogs from The Signal Sped Up
Here, model testing steps will be shown for the VFA then external adjustments to match reported data sheet numbers will be shown
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.
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.
Emerging issues and paths to improve the Phase Margin (PM) for VFA stages that have slipped into perhaps an unsuitably low margin condition
flash poll
educational resources
 
follow Planet Analog on Twitter
Planet Analog Twitter Feed
like us on facebook
our partners
Planet Analog
About Us     Contact Us     Help     Register     Twitter     Facebook     RSS