The design uses both anti-aliasing filters and reconstruction filters. The MSELP’s op-amp input provides both positive and negative inputs to the filter input. The MSHN6 and MSELP work down to 2 ...

Topologies that reduce the noise to system-tolerable levels vary from a low-cost RC input filter to more complex and expensive filtering techniques such as analog or digital post-processing.

A microcomputer output with an RC lowpass filter controls serial-to-parallel converter HC164 ... Figure 3 This circuit uses another serial-in/parallel-out register, the 4094, which has a strobe input ...