IP개요 |
the various types of filter structure applied to the band pass filter are described. Here, the proposed approximately band 1 band pass filter and approximately band 2 band pass filter were used to verify that the signals were attenuated in the band 1 and band 2 bands, respectively. Each band can be selected and controlled through the SPI. Through SPI, it is possible to control the band and the gain from the in 000 to 111 in the 3-digit binary range. From this, a band pass filter with a difference of 40 dB in the band was designed within 5 kHz bandwidth with a center frequency of approximately band 1 and band 2. |