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HPD Backplane read-out

HPD Backplane read-out. C det =400pF Q=320 fC t r =20ns Rate frame 300ns. Q. t r. t frame rate. Bari 15/01/07. Open loop poles Closed loop poles. The detector+amplifier can be approximately represented by a two dominant pole system.

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HPD Backplane read-out

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  1. HPD Backplane read-out • Cdet=400pF • Q=320 fC • tr =20ns • Rate frame 300ns Q tr tframe rate Bari 15/01/07

  2. Open loop poles Closed loop poles The detector+amplifier can be approximately represented by a two dominant pole system. The first pole is located at: flow=1/ 2pRin Cdet (for Cdet=400 pF and Rin=20 Ohm, flow= 20 Mhz) The second one is introduced by the amplifier and must be enough spaced from the first one in order to avoid ringing. The following closed loop situations arise: Bari 15/01/07

  3. Ipol In gm Cdet Out R1 U1 Rc R2 Cf R3 U2 Rf R4 Bari 15/01/07

  4. Current feedback amp., simplified schematic

  5. Main characteristics of THS3001 The THS3001 is a high-speed current-feedback operational amplifier, ideal for communication, imaging, and high-quality video applications. This device offers a very fast 6500-V/µs slew rate, a 420-MHz bandwidth, and 40-ns settling time for large-signal applications requiring excellent transient response. In addition, the THS3001 operates with a very low distortion of –96 dBc, making it well suited for applications such as wireless communication basestations or ultrafast ADC or DAC buffers. Bari 15/01/07

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