| Electronics > Projects, Designs, and Technical Stuff |
| High Speed Transimpedance Amplifier |
| << < (3/6) > >> |
| Marco:
If those are his real specs he's electron counting rather than measuring what can be treated as a continuous signal. At pA 100 MHz range you just get the occasional electron, most of the time there's nothing ... I'm pretty sure this isn't going to work at room temperature, unless he has a repetitive signal he can rescue from noise double digit dB stronger than the signal. |
| David Hess:
--- Quote from: AndyC_772 on June 11, 2019, 05:18:24 pm ---Even if you could build such an amplifier, I'm not sure how you'd ever use it without the output coupling back into the input to such an extent that it would go unstable. --- End quote --- Transimpedance amplifiers with this kind of performance exist in various forms. But they are extensions of the commonly studied operational amplifier based transimpedance amplifier. |
| AndyC_772:
Any chance of a link to some more information on them please? :-+ |
| cur8xgo:
Not sure if this was posted already: "High-Speed, Linear Transimpedance Amplifier Reference Design" Photo diode included! http://www.ti.com/lit/ug/tidud08/tidud08.pdf > 500 Mhz Current to voltage gain 500 to 10000 ohm Maybe this could be the front end? |
| Marco:
--- Quote from: cur8xgo on June 11, 2019, 07:31:27 pm ---Maybe this could be the front end? --- End quote --- Couple pA/rtHz noise current, signal is only 80 or so dB below the noise :) |
| Navigation |
| Message Index |
| Next page |
| Previous page |