C1667C

The C1667C is designed as one kind of Biquad IIR filter, C1667C can be used in many applications such as disk drives need both, controller and signal processing capabilities. For instance Infinite Impulse Response (IIR ) filters are an application today performed by dedicated signal processors. They are capable of implementing rational transfer functions as required by band pass filters.

The calculation of the C1667C output itself is performed by four 16 bit multiplications and the 32 bit results are accumulated in an general purpose register pair that contains the filter result. Due to the signed multiplication the accumulated 32 bit result has to be shifted one bit left to adjust the radix point. This operation only has to be performed once after all results have been accumulated. The general purpose register that contains the most significant bits is then used for updating the state variables. If you want to know more information such as the electrical characteristics about the C1667C, please download the datasheet in www.seekic.com or www.chinaicmart.com.