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通过对线阵电荷耦合器件(CCD)的时序及输出信号的分析,以TCD1707D为例介绍了一种实用的CCD驱动和信号输出处理电路。复杂可编程逻辑器件(CPLD)和控制外端结合,可以调节CCD驱动频率;采用直流处理、滤波放大、相关双采样等手段可降低CCD信号输出混杂的各种噪声和干扰;利用外控开关与可调电阻结合,可使得处理电路能与不同的驱动频率相匹配,得到更好的信号质量。电路结构简单,调试方便,可配合多种用户使用。
By analyzing the timing and output signals of CCD, a practical CCD driving and signal output processing circuit is introduced with TCD1707D as an example. Complex programmable logic device (CPLD) and the control of the external end, you can adjust the CCD drive frequency; using DC processing, filter amplification, correlated double sampling and other means can reduce the CCD signal output mixed with a variety of noise and interference; the use of external control switch and Adjustable resistor combination, can make the processing circuit with different drive frequency to match, get better signal quality. Circuit structure is simple, convenient debugging, with a variety of users.