Light emitting element drive circuit

Details Light emitting element drive circuit Light emitting element drive circuit

H - Electricity

04

B

325/1

H04B 10/04 (2006.01) H03K 17/041 (2006.01) H04B 10/155 (2006.01)

Patent

CA 2040626

A light emitting element drive circuit which has high operation speed, low current consumption and provides an optical output signal with minimum distortion. An inverted input signal is applied to a second transistor which drives a differentiating circuit. The differentiating circuit drives a third transistor which provides a current path for discharging the light emitting element. The light emitting element discharges when the input signal falls. The input of the differentiating circuit and the input of the light emitting element drive circuit are isolated to prevent "back gating" distortion of the optical signal.

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