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1 High sensitivity, low noise, low dark current, fast response.
2 The average dark current is often eliminated by means of a zeroing circuit.
3 The thermally generated dark current intrinsic to the photodiodes is always working to charge the diode.
4 High sensitivity, low collector dark current, high collector-emitter voltage type photocoupler.
5 UV to IR sensitivity, low dark current, For spectrophotometer, analytical instruments, medical instruments.
6 Light stimulation inhibits the retinal dark current through photo transduction signals in the photoreceptors.
7 The dark current that affects CCD detection sensitivity is described. The generating mechanism of dark current noise and its influence on CCD performance are analyzed.
8 The dark current and the counting rate have down to the 1/10 of its original level; the efficiency has not obvious change and stays around 97% .
9 For dark current determined by bulk effect, SHPD is slightly better.
10 Etching the surface of germanium layer could decrease the dark current and increase the responsivity under the visible light exposure.
11 It is found that the volume resistance increases, the electron gain and dark current decreases for MCP with film.
12 This architecture can get rid of the influence of dark current to efficient signal and increase the S/N of UFPA so that the precision of image output is enhanced extremely.
13 Methods The predigestion of circuit, ray tracing, the elimination of dark current and background light are analyzed.
14 Series of perfect crystal device technology( PCDT) is used in the device fabrication technologies to reduce the reverse dark current in PN junction of silicon photodetectors.
15 Experiments were done to probe into the characteristics of APD. The relationships between avalanche voltage, dark current, photocurrent, NEP and temperature were educed separately.
16 In the meanwhile, with using more accurate expression of the avalanche excess noise factor, we give a relation schema between sensitivity and dark current.
17 The photocathode composition determines the spectral response, the quantum efficiency at each wavelength, the overall uniformity of photomultiplier sensitivity, and the dark current.
18 In practice, other noise in the system can be reduced by introducing double optical harder- limiters also, such as:APD shot noise, APD dark current noise,[www.Sentencedict.com] background light and thermal noise.
19 Besides, dual detectors were used in each photoelectric transfer circuit to eliminate the influence of dark current of the photodetector.
20 In all optical asynchronous CDMA communication system, multi-user interference and PIN dark current noise can be reduced by introducing double optical harder- limiters .
21 Several test results, such as reverse voltage, photo sensitivity, dark current, terminal capacitance, terminal impedance, position distinguishability, position Iinearity, were reported in the paper.
22 The device can effectively improve photoelectric conversion gain of devices, limit the dark current of devices, and reduce the noise of devices, so as to obtain higher signal-to-noise.
23 We find that the photocurrent of this device is not reduced by the additional MQWs but the dark current is.
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