eliminating those unwanted op amp[TIA] outputs
Such a healthy aggressive interferer: 200MHz ringing. On VDD.



The OpAmps and Comparators will have 0dB PSRR at 200MHz. The reactance of bypass capacitor: cap internal ESL + PCB vias + PCB traces ~~ 5nH, is j6.3 ohms.

You may need X2Y.com 4-terminal capacitors, ~~ 0.5nH installed.

Try this







simulate this circuit &ndash; Schematic created using CircuitLab

The PI networks were repeated at the Sensor (2 meters away).
For dampening, use R = sqrt(L/C) 0.3 Ohms; thus some inductor/bead R is useful.

NOTE: The GND/RTN path is also broken. We want to implement "local batteries" at the low-noise analog electronics.

COMMENTS ARE VERY WELCOME. Is this overkill?