- Bajece Balkan Journal of Electrical added an answer:1Has anyone used the Hitachi nanopico absorbed current meter/mapper?
Hello, I have a Hitachi S3500N tungsten SEM and im interested in mapping DC current distributions in my samples. My Hitachi affiliate offerd me an equipment that they make called the "NanoPico". it is a current amplifier that has an output that can be connected to the SEM to obtain an image. My question is if any one has used it could you provied your insight or perhaps examples. or if any one knows of another option that would be helpful too.
Victor I HernandezFollowing
- Lutz von Wangenheim added an answer:13What is the difference between CFA and CFOA?
This is not a pure technical question but - more or less - a question when and how these shortcuts are commonly used.
I know the meaning behind CFOA - Current Feedback Operational Amplifier. And I also know why and how it works, but - on the other hand - we are using also the shortcut CFA (Current Feedback Amplifier).
Interestingly, some authors are using „CFOA“ for some special applications only.
And, therefore, my question: Two shortcuts for the same device, or is there a difference?
@ Sr. P.A.Martinez:
If I am not wrong - this text was submitted already 12 days ago.
- William M Connelly added an answer:1Does anyone have knowledge on Grass Instruments Model P16 Micro Electrode DC Amplifer?
Does anybody has the manual for Grass Instruments Model P16 Micro Electrode DC Amplifer?. It would be possible to use it for extracellular recording?
I don't have a manual, but I would certainly think it could perform field or EEG recording. Just keep the capacitance compensation off (or very low)Following
- Sujit K. Biswas added an answer:2What is the virtual ground in an op-amp in a open loop configuration and in feedback configuration?With diagram if possible.Ground in an electronic circuit refers to the common reference point for power supply and signals. In an open loop op-amp circuit, there is no concept of 'virtual ground'. However, in an op-amp with negative feedback such that it behaves as an amplifier, the inverting input maintains exact potential as that of the non-inverting input. Now, if the non-inverting input is physically connected to ground (as is done in most cases), the inverting input is said to be at 'virtual ground' since it has the same potential as ground without being physically connected to the ground.Following
- Robert John Taylor asked a question:OpenDoes anyone have a practical amplifier circuit diagram for use with an InGaAs avalanche diode? - Free Space Optical linkWe are thinking of using a Hamamatsu G8931 - 20 avalanche diode and a transimpedance amplifier such as the MC2007-3. Any suggestions?Following
About Current Feedback Amplifiers
Application of CFAs in Filters