The BK9521/BK9522 and BK9531/BK9532 chipsets are designed for wireless high-quality voice transmission, including a transmitter and a receiver. The chipsets operate within the frequency range of VHF 160–270 MHz and UHF 500–980 MHz.
The chipsets use π/4-DQPSK digital modulation and integrate high-performance audio ADCs and DACs, combined with extremely low-latency audio codecs, to provide high-fidelity digital audio transmission for applications such as sight-singing, stage performances, and teaching systems. The chipsets fully integrate radio frequency to baseband on a single chip, and eliminate the need for a compandor, which can significantly reduce the PCB size, greatly improve production reliability, and thereby reduce system costs.
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