Invention Grant
- Patent Title: Crosstalk cancellation using load impedence measurements
- Patent Title (中): 使用负载阻抗测量的串扰消除
-
Application No.: US11482595Application Date: 2006-07-08
-
Publication No.: US07925030B2Publication Date: 2011-04-12
- Inventor: Michael Holmström , Bengt Edholm , Sven Mattisson
- Applicant: Michael Holmström , Bengt Edholm , Sven Mattisson
- Applicant Address: SE Stockholm
- Assignee: Telefonaktiebolaget LM Ericsson (publ)
- Current Assignee: Telefonaktiebolaget LM Ericsson (publ)
- Current Assignee Address: SE Stockholm
- Main IPC: H04R1/10
- IPC: H04R1/10 ; H04R5/00

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.
Public/Granted literature
- US20080008325A1 Crosstalk cancellation using load impedence measurements Public/Granted day:2008-01-10
Information query