DIJ50462 (TV) infrared remote control transmit circuit

Published:2011/8/31 1:30:00 Author:Jessie | Keyword: infrared, remote control transmit | From:SeekIC

Technical characteristicsCMOS technology, low power consumption.Wide range power supply voltagein 2.2~5.5V.Only when people enter the button, oscillating circuit will produce oscillation, so power consumption is low.24-pin DIP. OSCIN and OSCOUT sides externally connect LC or ceramic filters to generate 480KHZ and 455KHZ reference frequency, then it generates 40KHZ or 38KHz frequency carrier by internal fractional frequency. Emission control signal uses pulse position modulation (PPM), where 0 code is the negative pulse with the duty cycle in 1 / 4, 1 code is the negative pulse with duty cycle in 1 / 8. Negative pulse modulation is on the 38KHZ 40KHZ carrier.



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