General Description
The CR-200 is a Gaussian shaping amplifier module, and is used to read out the “tail pulse” signals such as from charge sensitive preamplifiers, PMTs, and other similar detection circuits. Gaussian shaping amplifiers are also known as ‘pulse amplifiers’, ‘linear amplifiers’, or ‘spectroscopy amplifiers’ in the general literature. They accept a step-like input pulse and produce an output pulse shaped like a Gaussian function (bell curve). The purpose of these amplifiers is not only to transform the shape of the event pulse from a tail pulse to a bell curve, but also to filter much of the noise from the signal of interest. Use of shaping amplifiers will reduce the fall time of the pulse signals, reducing the incidence of pulse ‘pile up’, and improve the signal-to-noise of the detection system.
The CR-200 is available in 8 different shaping times, from 50 ns to 8 ns. The gain and shaping times of these amplifiers are fixed. If additional gain is desired, it is recommended that this be done with the application of an additional broadband amplifier between the preamplifier and the CR-200 shaping amplifier. Cremat offers an evaluation board (CR-160-R7) which includes a multi-stage variable-gain amplifier, as well as all necessary connectors.
Specifications Assume temp =20°C, Vs = 9V, unloaded output | |
amplification channels | 1 |
polarity | non-inverting |
operating temperature range | -40 ℃ to 85 ℃ |
input noise voltage CR-200-50ns CR-200-100ns CR-200-250ns CR-200-500ns CR-200-1 μS CR-200-2 μS CR-200-4 μS CR-200-8 μS |
115 μV RMS 90 μV RMS 60 μV RMS 47 μV RMS 36 μV RMS 30 μV RMS 24 μV RMS 22 μV RMS |
output impedance | <5 Ω |
output offset | -40 to +40 mV |
output temperature coefficient | -60 to +60 μV /℃ |
power supply voltage (Vs) absolute maximum minimum |
Vs = ±13 volts Vs = ±5 volts |
quiescent power supply current | 7 mA |
maximum output current | 20 mA |
maximum output swing* | Vs-0.5 volts |
for CR-200-50ns maximum output is +/-6V or Vs-0.5, whichever is less. | |
