A wide-dynamic-range, low-power photosensor array
A wide-dynamic-range, low-power photosensor array
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宽动态范围、低功耗光电传感器阵列
DOI：
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发表时间：
1994
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通讯作者：
Woodward Yang
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文献类型：
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作者：
Woodward Yang
具有脉冲频率输出的32/spl times/32阵列光电传感器采用标准2 /spl mu/m CMOS技术。光电传感器使用脉冲频率编码来实现10/sup 6/ in光能的线性动态范围。光电传感器的功耗与脉冲输出的频率成比例，在典型的照明和偏置条件下，整个32/spl times/32阵列的功耗<100 nW。入射光能的A/D转换直接通过计数固定时间段内的脉冲数或测量连续脉冲之间的时间间隔来实现。每个光电传感器元件都由光电二极管和低功耗CMOS电路实现，用于脉冲频率编码和读出。每个107/spl乘以/107 /spl μ/m/sup 2/光电传感器的所得填充因子约为12%。<<ETX>>
A 32/spl times/32 array of photosensors with pulse frequency outputs uses standard 2 /spl mu/m CMOS technology. The photosensors use pulse-frequency encoding to achieve a linear dynamic range of 10/sup 6/ in optical energy. Power dissipation of the photosensor is proportional to the frequency of the pulse outputs, and under typical illumination and bias conditions, the entire 32/spl times/32 array dissipates <100 nW. A/D conversion of incident optical energy is directly by counting the number of pulses in a fixed time period or by measuring the time interval between successive pulses. Each photosensor element is implemented with a photodiode and low-power CMOS circuitry for pulse frequency encoding and readout. The resulting fill-factor of each 107/spl times/107 /spl mu/m/sup 2/ photosensor is approximately 12%.<<ETX>>