公开(公告)号：US10659037B2

公开(公告)日：2020-05-19

申请号：US16117862

申请日：2018-08-30

Applicant: MOTOROLA SOLUTIONS, INC.

Inventor： David Corvino ,  Javier Alfaro ,  Carlos A. Garrafa

IPC: H03K17/16 ,  H04R3/00 ,  H03F3/187

Abstract: Systems and methods for an audio switching circuit. One system includes an audio switching circuit including a first P-channel transistor including a first source terminal, a first gate terminal, and a first drain, a second P-channel transistor including a second source terminal, a second gate terminal, and a second drain terminal, and a control circuit. The second drain terminal is coupled to the first drain terminal. The first P-channel transistor is configured to receive a first audio signal at the first drain terminal. The control circuit is configured to disconnect the first gate terminal from a ground reference, and in response to the presence of the first audio signal, cause a first voltage between the first gate terminal and the first source terminal to be approximately zero and prevent the first audio signal from passing through the first drain terminal.

公开(公告)号：US20200076418A1

公开(公告)日：2020-03-05

申请号：US16117862

申请日：2018-08-30

Applicant: MOTOROLA SOLUTIONS, INC.

Inventor： David Corvino ,  Javier Alfaro ,  Carlos A. Garrafa

IPC: H03K17/16 ,  H03F3/187 ,  H04R3/00

Abstract: Systems and methods for an audio switching circuit. One system includes an audio switching circuit including a first P-channel transistor including a first source terminal, a first gate terminal, and a first drain, a second P-channel transistor including a second source terminal, a second gate terminal, and a second drain terminal, and a control circuit. The second drain terminal is coupled to the first drain terminal. The first P-channel transistor is configured to receive a first audio signal at the first drain terminal. The control circuit is configured to disconnect the first gate terminal from a ground reference, and in response to the presence of the first audio signal, cause a first voltage between the first gate terminal and the first source terminal to be approximately zero and prevent the first audio signal from passing through the first drain terminal.