Crosstalk cancellation using load impedence measurements

Details Crosstalk cancellation using load impedence measurements Crosstalk cancellation using load impedence measurements

2011-04-12

2011-04-12

Mei, Xu (Department: 2614)

Electrical audio signal processing systems and devices

Headphone circuits

C381S001000, C381S017000

Reexamination Certificate

active

07925030

ABSTRACT:
A method and ASIC for canceling crosstalk between a first stereo channel and a second stereo channel, wherein a first signal is input to a first output amplifier for the first channel, and a second signal is input to a second output amplifier for the second channel, and an output load for each output amplifier is connected between each output amplifier and a reference amplifier. In one embodiment, the first and second signals are split prior to inputting the signals to the first and second output amplifiers, and a gain-adjusted portion of each signal is added to the other signal on the inputs of the output amplifiers. In another embodiment, the first and second input signals are again split into two paths each. While a first path of each signal is inputted to each signal's respective output amplifier, the second paths of the first and second signals are adding together. The resulting sum is adjusted by a gain function, biased by a suitable DC voltage, and input to the reference amplifier.

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