发明申请
US20110116654A1 DELAY TECHNIQUES IN ACTIVE NOISE CANCELLATION CIRCUITS OR OTHER CIRCUITS THAT PERFORM FILTERING OF DECIMATED COEFFICIENTS
审中-公开
基本信息:
- 专利标题： DELAY TECHNIQUES IN ACTIVE NOISE CANCELLATION CIRCUITS OR OTHER CIRCUITS THAT PERFORM FILTERING OF DECIMATED COEFFICIENTS
- 专利标题（中）：主动噪声消除电路或执行滤波系数滤波的其他电路的延迟技术
- 申请号：US12621156 申请日：2009-11-18
- 公开(公告)号：US20110116654A1 公开(公告)日：2011-05-19
- 发明人： Kwokleung Chan , Ren Li , Hyun Jin Park
- 申请人： Kwokleung Chan , Ren Li , Hyun Jin Park
- 申请人地址： US CA San Diego
- 专利权人： QUALCOMM Incorporated
- 当前专利权人： QUALCOMM Incorporated
- 当前专利权人地址： US CA San Diego
- 主分类号： H04B15/00
- IPC分类号： H04B15/00
摘要：
This disclosure describes circuit configurations that may be used for active noise cancellation in the digital domain. In particular, this disclosure proposes the use a down sample unit and an up sample unit, rather than memory-based delay circuits, to achieve one or more desired delays in digital adaptive noise cancellation circuits or other circuits that use delay for signal processing. The delay achieved by the down sample unit and the up sample unit may be tunable so as to allow flexibility in producing the necessary delay for different active noise cancellation circuit configurations. Many different adaptive noise cancellation circuit configurations are discussed, and the techniques may also be useful for other types of circuits, such as low-latency equalization circuits.
摘要（中）：
本公开描述了可用于数字域中的主动噪声消除的电路配置。 特别地，本公开提出使用下采样单元和上采样单元而不是基于存储器的延迟电路来实现数字自适应噪声消除电路或使用信号处理延迟的其它电路中的一个或多个期望的延迟。 下采样单元和上采样单元实现的延迟可以是可调谐的，以便允许灵活地为不同的有源噪声消除电路配置产生必要的延迟。 讨论了许多不同的自适应噪声消除电路配置，并且这些技术也可以用于其他类型的电路，例如低延迟均衡电路。