A single chip FSK modem

@article{Yamamoto1984ASC,
  title={A single chip FSK modem},
  author={Kazuo Yamamoto and Satoshi Fujii and Ken Matsuoka},
  journal={IEEE Journal of Solid-State Circuits},
  year={1984},
  volume={19},
  pages={855-861}
}
In the development of a fully LSI-designed single-chip 300-b/s asynchronous FSK modem, two `hard to beat' problems are: (1) to build both analog and digital circuits on-chip in-such a way that the modem performance is practically free from line noise and transmission distortion; and (2) to meet the requirement (CCITT V.21) of a +5 dBm level margin to… CONTINUE READING