Performance evaluation of an improved PRMA protocol for low earth orbit mobile communication systems. - Enrico Del Re; Romano Fantacci; Giovanni Giambene; Sergio Walter (Int. J. Satell. Commun. Netw., 1997)

A digitally corrected ADC using a passive pulse frequency modulator. - Eric Gutierrez; Luis Hernández 003; Ulrich Gaier; Sergio Walter; Liang Zou (ICECS, 2014)

A 0.03mm2, 40nm CMOS 1.5GS/s all-digital complementary PWM-GRO. - Enrique Prefasi; Eric Gutierrez; Luis Hernández 003; Susana Patón; Sergio Walter; Ulrich Gaier (ICECS, 2014)

A low power and low distortion VCO based ADC using a pulse frequency modulator. - Eric Gutierrez; Luis Hernández 003; Ulrich Gaier; Sergio Walter; Liang Zou (MWSCAS, 2014)

A Pulse Frequency Modulation VCO-ADC in 40 nm. - Eric Gutierrez; Carlos Perez; Luis Hernández 003; Fernando Cardes; Violeta Petrescu; Sergio Walter; Ulrich Gaier (IEEE Trans. Circuits Syst. II Express Briefs, 2019)