Active pixel sensor read-out channel

Active pixel sensor read-out channel

An active pixel sensor read-out channel. The active pixel sensor read-out channel includes an active pixel Ä2Ü. The active pixel Ä2Ü drives an active pixel output to a signal voltage having an amplitude proportional to an intensity of light received by the active pixel Ä2Ü. The active pixel Ä2Ü driv...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser: CHOU, ERIC Y
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
BASIC ELECTRIC ELEMENTS
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
PICTORIAL COMMUNICATION, e.g. TELEVISION
SEMICONDUCTOR DEVICES
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Beschreibung
Zusammenfassung:An active pixel sensor read-out channel. The active pixel sensor read-out channel includes an active pixel Ä2Ü. The active pixel Ä2Ü drives an active pixel output to a signal voltage having an amplitude proportional to an intensity of light received by the active pixel Ä2Ü. The active pixel Ä2Ü drives the active pixel output to a reference voltage when the active pixel is not exposed to light. The active pixel output is connected to a sample and hold circuit Ä10Ü. The sample and hold circuit Ä10Ü samples and stores the signal voltage and samples and stores the reference voltage. A buffer amplifier Ä20Ü generates a difference voltage between the sampled and stored signal voltage and the sampled and stored reference voltage.