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photodiode
(redirected from Photo diode)

    Also found in: Wikipedia, Hutchinson 0.07 sec.

A light sensor (photodetector) that allows current to flow in one direction from one side to the other when it absorbs photons (light). The more light, the more the current. Used to detect light pulses in optical fibers and other light-sensitive applications, it works the opposite of a light emitting diode (see LED). The photodiode detects light and creates a conductive path that allows electricity to flow. The LED receives electricity and emits light.

Solar Cells Are Photodiodes
Solar cells are photodiodes that are chemically treated (doped) differently than the photodiode used as a switch or relay. When solar cells are struck by light, their silicon material is excited to a state where a small electrical current is generated. Huge arrays of solar cell photodiodes are required to power a house. See photocell and phototransistor.



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In a Combo OPU, this second laser diode needs to be a higher power device to support writing, and the laser driver and photo diode array must be redesigned to support the write function.
Challenges Of CD-RW/DVD Combo Drive Design by Salmonsen, Dan / Computer Technology Review
Forza Silicon designs custom CMOS image sensors, which comprises Tower's Advanced Photo Diode (APD) pixel IP, and utilizes its Fab2, 0.
Forza Silicon Joins Tower Semiconductor's Authorized Design Center ... by Business Wire
The new CIS chip uses Samsung's proprietary 90nm copper technology that reduces the distance between the micro-lens to the photo diode thereby resulting in maximizing the light-gathering efficiency to overcome the potential decline of image quality as the pixel size scales down.
Samsung Develops 1/4-inch 3-megapixel CMOS Image Sensor for Ultra ... by Business Wire
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