H - Electricity – 03 – K
Patent
H - Electricity
03
K
328/114
H03K 5/02 (2006.01) H03K 17/60 (2006.01) H04B 10/155 (2006.01)
Patent
CA 1211164
ABSTRACT OF THE DISCLOSURE There is disclosed a light emitting diode driver circuit, including a differential amplifier having emitter coupled transistors, a light emitting diode connected to a collector of one of the emitter coupled transistors of the differential amplifier, and a current source circuit connected to a common emitter of the emitter coupled transistors. The light emitting diode driver circuit comprises a first delay circuit for generating a first delay signal and an inverted signal in phase to the first delay signal by delaying an input signal, a second delay circuit for delaying the first delayed signal, and an OR circuit for providing logical sum of the input signal, the first delayed signal and an output of the second delay circuit. The first delayed signal and the inverted signal associated therewith drive the emitter coupled transistors, and an output of the OR circuit drives the current source circuit.
468469
Corporation Nec
Smart & Biggar
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