: PIN光电二极管,四个低噪声运算放大器和比较器,用于探测单个光子的伽玛射线。的原理,设计考虑和选择组件进行了讨论。Maxim/Dallas > App Notes > AMPLIFIER AND COMPARATOR CIRCUITS AUTOMOTIVE
MEASUREMENT CIRCUITS
Keywords: gamma ray, photon, radiation detector, low noise op amp, PIN, photodiode, gamma radiation, Jul 21, 2003
operation amplifiers, op amps, comparator
APPLICATION NOTE 2236
Gamma-Photon Radiation Detector
A PIN photodiode, four low-noise op amps and a comparator are used to detect individual photons of gamma
radiation. The schematic, design considerations and component selection are discussed.
The circuit of Figure 1 includes a PIN photodiode that detects individual photons of gamma radiation. When a
photon strikes a depletion region created by reverse bias on the photodiode, it produces a small amount of
charge in proportion to the photon's energy. The resulting signal is then……