An improved low-power CMOS direct-conversion transmitter for GHz wireless communication applications

Hong Sing Kao, Chung-Yu Wu

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The proposed transmitter chip is fabricated in a standard 0.25 μm single-poly-five-metal CMOS process with low resistance substrate. It consists of a quadrature modulator, a quadrature VCO, and a power amplifier. This transmitter IC consumes only 45 mA from a 2.5 V power supply voltage. With highly linear quadrature modulator and low phase-error quadrature VCO structure, the measured LO leakage, image rejection, second-order inter-modulation and third-order inter-modulation of the modulated signal, at the output of transmitter, achieves -59d Bc, -57 dBc, -600 dBc, and -56 dBc, respectively. The three-stage power amplifier is also integrated to provide a 9.8 dBm output power with 15% efficiency for short-range wireless communication applications.

Original languageEnglish
Title of host publicationProceedings - APCCAS 2002
Subtitle of host publicationAsia-Pacific Conference on Circuits and Systems
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages5-8
Number of pages4
ISBN (Electronic)0780376900
DOIs
StatePublished - 1 Jan 2002
EventAsia-Pacific Conference on Circuits and Systems, APCCAS 2002 - Denpasar, Bali, Indonesia
Duration: 28 Oct 200231 Oct 2002

Publication series

NameIEEE Asia-Pacific Conference on Circuits and Systems, Proceedings, APCCAS
Volume1

Conference

ConferenceAsia-Pacific Conference on Circuits and Systems, APCCAS 2002
CountryIndonesia
CityDenpasar, Bali
Period28/10/0231/10/02

Keywords

  • CMOS process
  • Electrical resistance measurement
  • Phase measurement
  • Phase modulation
  • Power amplifiers
  • Power supplies
  • Transmitters
  • Voltage
  • Voltage-controlled oscillators
  • Wireless communication

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