Audio crosstalk reduction
OwnerJyoti Raj, Syed Hameed +1inventors
InventorsJyoti Raj, Syed Hameed, Anand Subramanian
Life of this patent
Estimating the term…
Abstract
An apparatus includes a first switch having a first switch terminal coupled to a first terminal and having a second switch terminal. A second switch has a third switch terminal coupled to a second terminal and has a fourth switch terminal. A first amplifier has a first input and a second input. A second amplifier has a third input and has a first output. A common mode generation circuit has first and second terminals. The first terminal of the common mode generation circuit is coupled to the second switch terminal and to the fourth switch terminal, and the second terminal of the common mode generation circuit is coupled to the first amplifier and to the third input.
Claims22
An apparatus comprising:
- a first switch having a first switch terminal coupled to a first terminal and having a second switch terminal;
- a second switch having a third switch terminal coupled to a second terminal and having a fourth switch terminal;
- a first amplifier having a first input and a second input;
- a second amplifier having a third input and having a first output;
- and
- a common mode generation circuit having first and second terminals, the first terminal of the common mode generation circuit coupled to the second switch terminal and to the fourth switch terminal, and the second terminal of the common mode generation circuit coupled to the first amplifier and to the third input.
An integrated circuit (IC) comprising:
- an audio amplifier having first and second inputs coupled to respective first and second terminals of the IC;
- a microphone bias amplifier having a third input and having a first output, the first output coupled to a third or fourth terminal of the IC;
- and
- a common mode generation circuit having a second output coupled to the audio amplifier and to the microphone bias amplifier, the common mode generation circuit configured to provide a common mode voltage for the audio amplifier and the microphone bias amplifier, the common mode generation circuit having a first ground coupled to a fifth or sixth terminal of the IC.
A system comprising:
- an audio connector;
- and
- an audio amplifier having inputs coupled to the audio connector;
- a microphone bias amplifier having an input and a first output, the first output coupled through to the audio connector;
- and
- a common mode generation circuit having a second output coupled to an input of the inputs of the audio amplifier and to the input of the microphone bias amplifier, the common mode generation circuit having a common mode generation circuit ground coupled to the audio connector.
Dependencies are inferred from the claim text.