Cambridge Silicon Radio logo
<a href="https://en.wikipedia.org/wiki/CSR_(company)" class="extiw" title="w:CSR (company)">CSR</a>
Own work based on: <a href="//commons.wikimedia.org/wiki/File:CSR_plc_logo_Sept_2013.jpg" title="File:CSR plc logo Sept 2013.jpg">CSR plc logo Sept 2013.jpg</a>