Differential audio system and control method supporting single-ended signal

Abstract

The invention discloses a differential audio system supporting single-ended signals and a control method. The system includes an audio access module and a differential signal processing module; wherein, the audio access module includes a P input end, an N input end, a P input output terminal and N output terminal; the differential signal processing module includes a P input terminal and an N input terminal; the audio access module is used to receive audio signals from the external audio equipment and control the differential signal processing module. The working state of the N input terminal is also used to convert the single-ended signal into a differential signal when the audio signal is a single-ended signal. By using the embodiments of the present invention, the differential audio system can support single-ended signal input while avoiding signal loopback and radio frequency interference.

Description

technical field [0001] The invention relates to the field of integrated circuits, in particular to a differential audio system and a control method supporting single-ended signals. Background technique [0002] Between two audio systems, the audio signal connection methods are mainly as follows: single-ended-single-ended, differential-differential, single-ended-differential, differential-single-ended. In practical applications, some application products based on differential audio systems require differential signals to be connected to single-ended signals, as well as to differential signals. In this case, two interfaces are usually designed, which is quite cumbersome for users. Because for users, switching between single-ended signals and differential signals can only be achieved by plugging and changing ports, which is prone to errors and very troublesome. Moreover, if the signal is directly connected to the audio system without considering the difference between the sing...

AI Technical Summary

Problems solved by technology

In practical applications, some application products based on differential audio systems need to connect differential signals with single-ended signals, and also connect with differential signals. At this time, two interfaces usually need to be designed, which will be quite cumbersome for users.

Because for the user, the switching between single-ended signal and differential signal can only be realized by plugging and plugging the port, which is error-prone and very troublesome.

Moreover, if the signal is directly connected to the audio system regardless of the difference between the single-ended and differential signals, then due to the difference in the ground plane between the two audio systems, it is easy to cause signal loopback and the signal is susceptible to radio frequency interference

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