Title :
DC-DC converter using a novel low power dissipation control IC for a transmitting amplifier of digital portable telephones
Author :
Yamashita, N. ; Serad, T. ; Sakai, T. ; Tsukamoto, K. ; Yachi, T.
Author_Institution :
NTT, Tokyo, Japan
Abstract :
A DC-Dc converter used as a DC amplifier for a transmitting amplifier of digital portable telephones is presented. The DC-DC converter can supply a modulated voltage to the transmitting amplifier and achieves a significantly higher efficiency by about 30% over a conventional series regulator. The higher efficiency is due to a newly developed low-dissipation control IC. It consists primarily of CMOS devices which reduce dissipation. The higher efficiency translates into a longer battery usage time. The IC minimizes the converter size since all the needed converter control functions are built in. It makes possible achieving a compact digital portable telephone with longer usage hours
Keywords :
CMOS integrated circuits; digital communication systems; power amplifiers; power convertors; radiofrequency amplifiers; telephone sets; CMOS devices; DC amplifier; DC-Dc converter; control IC; digital portable telephones; efficiency; low power dissipation; modulated voltage; power amplifiers; transmitting amplifier; Batteries; Circuits; DC-DC power converters; Digital modulation; Power amplifiers; Power dissipation; Radio frequency; Radiofrequency amplifiers; Telephony; Voltage control;
Conference_Titel :
Telecommunications Energy Conference, 1992. INTELEC '92., 14th International
Conference_Location :
Washington, DC
Print_ISBN :
0-7803-0779-8
DOI :
10.1109/INTLEC.1992.268405
