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TPS62200DBVR

TPS62200DBVR资料
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File Size : 116 KB Manufacturer:TI Description:There are two methods for reading out the signal from an NMOS linear image sensor. One is a current detection method using the load resistance and the other is a current integration method using a charge amplifier. In either readout method, a positive bias must be applied to the video line because photodiode anodes of NMOS linear image sensors are set at 0 V (Vss). Figure 8 shows a typical video bias voltage margin. As the clock pulse amplitude is higher, the video bias voltage can be set larger so the saturation charge can be increased. The rise and fall times of the video output waveform can be shortened if the video bias voltage is reduced while the clock pulse amplitude is still higher. When the amplitude of ö1, ö2 and öst is 5 V, setting the video bias voltage at 2 V is recommended. To obtain good linearity, using the current integration method is advised. In this method, the integration capacitance is reset to the reference voltage level immediately before each photodiode is addressed and the signal charge is then stored as an integra- tion capacitive charge when the address switch turns on. Fig- ures 9 and 10 show a typical current integration circuit and its pulse timing chart. To ensure stable output, the rise of a reset pulse must be delayed at least 50 ns from the fall of ö2.

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型号：TPS62200DBVR 厂家：TI 封装：SOT23 批号：09+ 数量：30000 说明：全新原装正品现货，专业供应


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