Patent ID: 8787588
Filing Date: 2014-07-22
Classification: H04R

Abstract:
1. A system comprising: first, second, and third pin interfaces; a first device coupled between the first and second pin interfaces; a second device that is coupled to the first pin interface and shares the first pin interface with the first device; a first driver circuit shared between the first pin interface and the third pin interface, wherein the first driver circuit includes a first combined cascode circuit including at least two cascode circuits to selectively drive the first pin interface or the third pin interface; a fourth pin interface and a second driver circuit shared between the second pin interface and the fourth pin interface, wherein the second driver circuit includes a second combined cascode circuit to selectively drive one of the second pin interface and the fourth pin interface; a third device, wherein the second device is coupled to the fourth pin interface and shares the fourth pin interface with the third device; wherein the first device is a low power speaker, the second device is a high power speaker and the third device is an earphone speaker coupled to the mobile device.