Electricity - Collection Time constant?

A detector with charge collection time of 150 ns is used with a preamplifier whose input circuit can

be represented by the parallel combination of 300 pF and 10,000 ohms. Does this situation fall in the

category of small or large collection circuit time constant

2 Answers

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  • goober
    Lv 7
    8 years ago
    Best Answer

    Large collection time.

    300 pF and 10,000 ohms --> 3 us Which is large (20x) compared to 150 ns

  • 8 years ago

    Is the detector a current source? If it has low source resistance, the time constant is {Rs||10k}*300pF. Thus if Rs is 200ohms, the time constant is 60nS adn can well handle the sensor collection time.. What is collection time?? that does not sound to be a scientific word. Is it delay time? Or is it response time??

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