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In the data sheet of a 400 MHz transistor I found fall time = 60 ns. Clearly these are contradictory specifications
- trise and tfall should be at least an order of magnitude shorter.
Should I believe that fT is specified correctly? (e.g. 2SA2088FRAT106Q transistor).
Chopper amplifier of microvolt DC signals
I understand that a chopper keeps flipping the input DC signal so that an AC signal is obtained and amplified.
But to do it with microvolt signals requires using noise-free switches. The only relatively noise-free method of
switching that comes to my...
I saw it in a data sheet of an Analog Devices MOSFET-input precision op amp. Has anyone tried to use such an op amp, so you can tell me if
1 µV voltage offset is true?
With the specific inductance of the order of 1 microHenry/m and specific capacitance 100 pF/m it is hard to believe low attenuation at GHz range. To get a brutal estimate, consider length = 1m and ω = 6 Grad/s - then we are dealing with 6kΩ of inductive reactance and with 1.66 Ω of capacitive...
High inductive impedance and low capacitive impedance of coaxial cables make it unbelievable that with proper resistive termination R such a coaxial cable behaves like a lossless line with the resistance R at the end.
Do HF probes in oscilloscopes brutally amplify signals to make up for...
There do not seem to be good probes on the market. I want to see a 5 MHz rectangular wave with 500 ps switching time.
Is anyone aware of a solution of this problem?
In the response of dick freebird above there is the statement:
"GIDL (gate induced drain leakage) is a thing in some types
of MOSFETs (though I've seen it more in integrated, plain
FETs). That means after some distance into negative Vgs,
drain current increases from its minimum."
My original...
New production techniques may be necessary - e.g. all Cu ICs including leads, microwelding. For a given A/D converter it is possible to compensate for nonlinearity.
If I want e.g. 28-bit accurate A/D conversion by multiple conversions and averaging, what is the optimal A/D converter - so that total conversion time is the shortest?
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