公开(公告)号：US20230216453A1

公开(公告)日：2023-07-06

申请号：US18121315

申请日：2023-03-14

Applicant: Intel Corporation

Inventor： Yagnesh V. Waghela ,  Sumod Cherukkate ,  Sagar Gupta ,  Sudhakar Arehole Narayana Manja ,  Soumya Prakash Mishra ,  Bala Subramanya ,  Jayprakash Thakur

IPC: H03F3/189 ,  H04R9/06

CPC classification number: H03F3/189 ,  H04R9/06 ,  H03F2200/451 ,  H03F2200/03

Abstract: The speaker coil in a dynamic speaker in a mobile computing device can be used to generate radio frequency (RF) signals having a frequency of about 100 kHz or greater. A speaker amplifier drives the dynamic speaker to produce sound and RF circuitry drives the speaker amplifier to generate the RF signals having a frequency of about 100 kHz or greater. The speaker coil can comprise a tap at an appropriate point between the ends of the coil to cause the coil to operate at resonance over a desired RF frequency band. A low-pass filter can be positioned at the speaker amplifier output to protect the speaker amplifier from RF energy generated by the RF circuitry and a high-pass filter can be positioned at the output of the RF circuitry to protect the RF circuitry from audio energy generated by the speaker amplifier.