Products > Test Equipment
Pocket-Sized 6 GHz 1 TS/s ET Scope
azonenberg:
As far as protection goes there are some pretty low capacitance ESD diodes you might want to look at that would be better than nothing, SZESD7471N2T5G claims 350 fF for the diode itself (assuming you do a good layout and probably cut away some ground plane to avoid adding excess capacitance that way). I'm considering that for some upcoming designs that will run up to 10 Gbps.
JohnG:
350 fF is -j76 ohms at 6 GHz. If the design was 6 GHz without protection, it will be closer to 5 GHz with protection, not counting any stray inductance. That's a substantial hit.
John
JohnG:
Speaking of bandwidth, any chance there is something higher bandwidth in the works? Asking for a friend >:D
John
SJL-Instruments:
@John - We don't want to say much about that at the moment :) What bandwidth did you have in mind?
Note that the 0.35/tau bandwidth for the GigaWave is usually around 10 GHz. (The datasheet "typical" 8 GHz is conservative.) The advertised 6 GHz is very conservative. Since the response is not quite Gaussian, the effective number depends on your application.
mawyatt:
Interesting, nice work :-+
This architecture seems like a subset of the Non-Uniform-Sampling (NUS) ADC concepts championed by Dr Mike Chen at USC back in 2000s.
With the NUS ADC the input signal in quantized in both amplitude and time, which offers some unique features/characteristics (like post Anti-Aliasing filtering) as shown in the references below.
https://ieeexplore.ieee.org/abstract/document/6503693
Here's a low resolution image we took long ago of an early developmental Non-Uniform Sampling ADC chip fabricated in 65nm TSMC CMOS.
Best,
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