发明授权
US08583715B1 Configuring a CIC filter in a programmable integrated circuit device 有权
在可编程集成电路设备中配置CIC滤波器

Configuring a CIC filter in a programmable integrated circuit device
摘要:
A programmable integrated circuit device can be configured as a cascaded integrator-comb (CIC) filter. In order to take advantage of Hogenauer pruning to configure the CIC filter efficiently, a software tool for configuring the device can be provided in which the Fj terms for Hogenauer pruning have been calculated in advance for all possible user parameters supported by the tool. To configure a CIC filter, the user enters the parameters in the tool, which then looks up the Fj terms corresponding to those parameters and completes the calculation of the Bj terms for Hogenauer pruning. Because the calculation of the Fj terms is the most time-consuming step in calculating of the Bj terms, pre-calculation of the Fj terms, which can be done just once by the provider of the tool, allows end users to calculate the Bj terms in reasonable periods of time, making Hogenauer pruning available to end users.
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