The goal of this conditioning is to provide—as nearly as is possible—sine/cosine waves with equal amplitude, zero offset, and precisely 90° phase shift. Programmable gain amplifiers (PGAs) and/or ...

Demodulators, directional circuits,and other electronics applicationsoften need two sine waves witha 90° difference in phase—a sine waveand its cosine wave. Engineers typicallyuse analog filters to ...