TSOP1738 DATASHEET PDF

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This is specifically done to make the sensor immune to other forms of infrared signals present in the atmosphere such as from sunlight, fluorescent tube lights etc. This feature allows the device to be used in various forms of remote control applications without worrying about any form of external false triggering. The lead frame is used to assemble the preamplifier and PIN diode along with the IR filter which is a design of the epoxy package.

A microprocessor is used to decode the output signal directly which is demodulated in an easy way. The TSOP series is considered as the standard series for the infrared remote control receiver which in turn supports all the important transmission codes. In order to suppress or avoid this noise and signal disturbances, the TSOP series works by using different applications such as an integrator stage, a bandpassfilter, and an automatic gain control.

The distinction between a disturbance signal and a data signal can be carried out by reading the burst length, carrier frequency, and the duty cycle. For every burst of the data signal which occurs for duration of more than 1. The length of this gap time must be at least equal to the burst length. But, the sensitivity in this case is reduced to a specific level where the occurrences of unexpected pulses can happen.

The different disturbance signals, which can be suppressed when TSOP 17xx series is used, are: DC light which can range from a simple tungsten ball to the more powerful natural resource of sunlight The signal which are continuously received at 38kHz or signal received at frequency other than 38kHz The signals which are received from fluorescent lamps which consist of electronic ballast.

The figure given below shows a sample of how the signal modulation occurs. You may also like:.

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