A Novel Low-Power Dissipation and High-Speed Converter-Control-IC for the Transmitting Amplifier of Digital Portable Telephones
Summary :
A novel low-power dissipation and high-speed converter-control-IC has been developed for the transmitting amplifier in digital portable telephones. The IC consists mainly of CMOS devices to reduce the bias current. To improve circuit speed, bipolar transistors are used in the output stage of the operational amplifier and in the current sources of the oscillator because they have a larger current capability and smaller parasitic capacitance than CMOS devices. The IC has one-fifth the bias current of a conventional control circuit consisting of discrete devices, and it can operate up to a switching frequency of 3MHz. The small bias current increases converter efficiency, and the high switching frequency reduces converter size. Using this IC, converter loss is 17% less than that with a conventional control circuit.
- Publication
- IEICE TRANSACTIONS on Communications Vol.E77-B No.12 pp.1600-1606
- Publication Date
- 1994/12/25
- Publicized
- Online ISSN
- DOI
- Type of Manuscript
- PAPER
- Category
- Power Supply
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Nobuhiko YAMASHITA, Takuji SERADA, Tatsuo SAKAI, Kazuo TSUKAMOTO, Toshiaki YACHI, "A Novel Low-Power Dissipation and High-Speed Converter-Control-IC for the Transmitting Amplifier of Digital Portable Telephones" in IEICE TRANSACTIONS on Communications,
vol. E77-B, no. 12, pp. 1600-1606, December 1994, doi: .
Abstract: A novel low-power dissipation and high-speed converter-control-IC has been developed for the transmitting amplifier in digital portable telephones. The IC consists mainly of CMOS devices to reduce the bias current. To improve circuit speed, bipolar transistors are used in the output stage of the operational amplifier and in the current sources of the oscillator because they have a larger current capability and smaller parasitic capacitance than CMOS devices. The IC has one-fifth the bias current of a conventional control circuit consisting of discrete devices, and it can operate up to a switching frequency of 3MHz. The small bias current increases converter efficiency, and the high switching frequency reduces converter size. Using this IC, converter loss is 17% less than that with a conventional control circuit.
URL: https://global.ieice.org/en_transactions/communications/10.1587/e77-b_12_1600/_p
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@ARTICLE{e77-b_12_1600,
author={Nobuhiko YAMASHITA, Takuji SERADA, Tatsuo SAKAI, Kazuo TSUKAMOTO, Toshiaki YACHI, },
journal={IEICE TRANSACTIONS on Communications},
title={A Novel Low-Power Dissipation and High-Speed Converter-Control-IC for the Transmitting Amplifier of Digital Portable Telephones},
year={1994},
volume={E77-B},
number={12},
pages={1600-1606},
abstract={A novel low-power dissipation and high-speed converter-control-IC has been developed for the transmitting amplifier in digital portable telephones. The IC consists mainly of CMOS devices to reduce the bias current. To improve circuit speed, bipolar transistors are used in the output stage of the operational amplifier and in the current sources of the oscillator because they have a larger current capability and smaller parasitic capacitance than CMOS devices. The IC has one-fifth the bias current of a conventional control circuit consisting of discrete devices, and it can operate up to a switching frequency of 3MHz. The small bias current increases converter efficiency, and the high switching frequency reduces converter size. Using this IC, converter loss is 17% less than that with a conventional control circuit.},
keywords={},
doi={},
ISSN={},
month={December},}
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TY - JOUR
TI - A Novel Low-Power Dissipation and High-Speed Converter-Control-IC for the Transmitting Amplifier of Digital Portable Telephones
T2 - IEICE TRANSACTIONS on Communications
SP - 1600
EP - 1606
AU - Nobuhiko YAMASHITA
AU - Takuji SERADA
AU - Tatsuo SAKAI
AU - Kazuo TSUKAMOTO
AU - Toshiaki YACHI
PY - 1994
DO -
JO - IEICE TRANSACTIONS on Communications
SN -
VL - E77-B
IS - 12
JA - IEICE TRANSACTIONS on Communications
Y1 - December 1994
AB - A novel low-power dissipation and high-speed converter-control-IC has been developed for the transmitting amplifier in digital portable telephones. The IC consists mainly of CMOS devices to reduce the bias current. To improve circuit speed, bipolar transistors are used in the output stage of the operational amplifier and in the current sources of the oscillator because they have a larger current capability and smaller parasitic capacitance than CMOS devices. The IC has one-fifth the bias current of a conventional control circuit consisting of discrete devices, and it can operate up to a switching frequency of 3MHz. The small bias current increases converter efficiency, and the high switching frequency reduces converter size. Using this IC, converter loss is 17% less than that with a conventional control circuit.
ER -
English
