Implementation of high-speed voiceband data modems using the TMS320C25. - Hui-Hung Lu; David Hedberg; Bernard Fraenkel (ICASSP, 1987)

Sigma-delta A/D and D/A for high speed voiceband modems. - Nan-Sheng Lin; Bernard Fraenkel; Gordon Jacobs; Leechung Yiu; Daniel Senderowicz; Richard Ulmer (ICASSP, 1989)