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Optical receiver having a low capacitance integrated photodetector - Patent 5189296 (3971 words) |
 | 2 illustrates a block diagram of a photodetector structure according to the present invention in which the effective capacitance of the photodetector is very small yet the alignment area of the detector is large enough to permit inexpensive alignment and connections. |
| In particular, a plurality of electrodes attached to the gate of transistor 235 are interposed between a plurality of electrodes attached to busbar 205. |
| Photodetector 233 is further connected to busbar 205 and capacitor 236 is further connected to busbar 210. |
| U.S. Patent: 5008544 - System for the detection of information in the form of electromagnetic radiation and reading the ... (4246 words) |
| When photodetector 6 receives infrared radiation, it supplies an electron current I to the source 12 of the polarization transistor 8 and at the end of an integration time ti, a charge Q equal to I.ti is accumulated beneath the storage capacity 16. |
| Photodetector 6, exposed to flux.phi.1 (respectively.phi.2) produces a current Il (respectively I2) constituting the ordinate of the intersection point of characteristic A and characteristic C1 (respectively C2) or the static operation point of the system exposed to flux.phi.1 (respectively.phi.2). |
| When a plurality of photodetectors is provided, it is possible to use a single source 24 and a single source 26 for all the transistors 22 associated with these photodetectors and a single source 28 for all the transistors 8 also associated with said photodetectors. |
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