Physics and Engineering of Radiation Detection

496 Chapter 8. Signal Processing intensity. Such measurements are performed using two devices called single channel and multi ch ...

8.6. Discrimination 497 laborious and time consuming task, not to mention inefficient and prone to uncer- tainties related to ti ...

498 Chapter 8. Signal Processing 8.7 AnalogtoDigitalConversion Converting an analog pulse into digital form is very convenient i ...

8.7. Analog to Digital Conversion 499 full dynamic range of the system. The lowest number that the ADC can assign to a meaningfu ...

500 Chapter 8. Signal Processing 8.7.B A/DConversionMethods B.1 DigitalRampADC....................... This simple technique invo ...

8.7. Analog to Digital Conversion 501 Vin Digital Output Time Figure 8.7.2: Counting cycles in a digital ramp ADC.
Irregular Sa ...

502 Chapter 8. Signal Processing − + Clock Read Converter Analog Digital to Output Register Shift Vin Comparator Successive Appr ...

8.7. Analog to Digital Conversion 503 − + Clock Counter Converter Analog Digital to Vin Comparator Up/Down Output Figure 8.7.5: ...

504 Chapter 8. Signal Processing to completely discharge the capacitor having capacitanceC.HereVinis the input voltage. Since th ...

8.7. Analog to Digital Conversion 505 very long time for high rate applications. Increasing the resolution to 16 bits at the sam ...

506 Chapter 8. Signal Processing Fig.8.7.9 depicts the working principle of a typical flash ADC. As shown, the ADC consists of a ...

8.8. Digital Signal Processing 507 subsequent filtration are done digitally therefore the process totally eliminates the need to ...

508 Chapter 8. Signal Processing : Sampled Points : Sampled Points Aliasing Analog Pulse Analog Pulse Time (a) Time (b) Pulse He ...

8.9. Electronics Noise 509
adders,
delay function, and
multipliers. Since typical digital filters consist of very large numbe ...

510 Chapter 8. Signal Processing medium, implying that the deposited energy is 90keV. The number of electron hole pairs generate ...

8.9. Electronics Noise 511 electron hole pairs is N = Edep W = 150 × 103 3. 6 (sinceW=3. 6 eV/charge pair for Si) =4. 17 × 104 c ...

512 Chapter 8. Signal Processing average value (see Fig.8.9.1(a)). These fluctuations are due to the thermal noise of the conduc ...

8.9. Electronics Noise 513 Note that these expressions do not represent total noise, only the noise density or noise per unit ba ...

514 Chapter 8. Signal Processing The power density can be used to define the spectral shot noise current densityi^2 s and spectr ...

8.9. Electronics Noise 515 whereAis a system dependent constant of proportionality. The above expression when multiplied by the ...