Patent ID: 8492705

Claim:
A radiation detector comprising: a photosensor to receive light via an input and to send an electrical pulse via an output in response to receiving the light; and a pulse analyzer to send an indicator to a pulse counter when the electrical pulse corresponds to a scintillation pulse and to not send the indicator to the pulse counter when the electrical pulse corresponds to a noise pulse, wherein the pulse analyzer is coupled to the output of the photosensor; wherein the pulse analyzer includes a circuit configured to substantially prevent the electrical pulse from being received at the pulse counter unless the electrical pulse corresponds to a scintillation pulse, the circuit including a plurality of discriminator circuits, each discriminator circuit to receive a replicate of the electrical pulse at a different time, to compare a different portion of the electrical pulse to a threshold of the discriminator circuit, and to determine that an electrical pulse corresponds to a scintillation pulse when each of a first subset of the plurality of discriminator circuits determines that an amplitude of a portion of the electrical pulse exceeds its threshold.