SiPM Amplifier Optimization

The SiPM amplifier currently in use for SiPM characterization needs to adapted for tagger microscope use. The following are the performance requirements:


 * 1) maximized gain at maximum Vcc of 15V to overcome the fADC's 8-bit resolution (minimum voltage scale: 0.5V)
 * 2) gain of about 1.5k&Omega; for regular running with minimum sensitivity to transistor's &beta; parameter.
 * 3) minimized pulse width for high rate tagging