Custom Case Study
Our customer was evaluating IR receiver modules for a new consumer application design. They required a device that would minimize component counts, costs, and board space requirements, while increasing manufacturability. Furthermore, the module needed to be capable of handling multiple remote control codes between system frequencies of 38 kHz and 56 kHz. However, standard IR receivers are optimized for one frequency, typically 36 kHz or 38 kHz. While they can receive remote control signals for other frequencies, their bandwidth is limited to signals from 26 kHz to 50 kHz, as illustrated by the blue line in the graph below.
Vishay customized an IR receiver’s design by changing the setting of the bandpass filter, which provided responsiveness over a much wider spectrum from 20 kHz to 60 kHz (as shown by the black dotted line in above graph). This change was implemented in a short time frame, due to our in-house IC circuit design and probe software capability.
Thanks to Vishay’s custom solution, our customer was able to use a single IR receiver module, which reduced the component count, board space requirements, and manufacturing and acquisition costs.
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