Cambridge Silicon Radio

CSR (Cambridge Silicon Radio) was a prominent British fabless semiconductor company that specialized in wireless connectivity, audio, and location-based technologies. Founded in 1998 and headquartered in Cambridge, UK, the company became a global leader in Bluetooth technology, providing the hardware and software foundations for billions of consumer electronics devices. While primarily a technology firm, CSR's low-power wireless solutions and high-fidelity audio chips became integral to the healthcare industry, powering medical wearables, hearing aids, and remote patient monitoring systems. The company's portfolio included the well-known BlueCore line of Bluetooth chips and the aptX audio codec, which set industry standards for wireless sound quality. In 2015, CSR was acquired by Qualcomm for approximately $2.5 billion, a move that integrated its connectivity and audio expertise into the Snapdragon mobile and automotive platforms.