On-chip voice-coil motor driver for mobile auto-focus camera applications

Sung Hyun Yang, Sung Min Sohn, Kuk Tae Hong, Hyoung Soo Lee, Bo Ik Sohn

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Scopus citations

Abstract

On-chip voice-coil motor (VCM) driver for mobile auto-focus (AF) camera applications is proposed and integrated into image signal processor (ISP) satisfying small size and low-power consumption. In order to control the location of AF lens, a charge pump (CP) or digital-to-analog converter (DAC) can be selected. Since a large current is required to drive the VCM, the buffer amplifier was inserted after charge pump or DAC. On-chip VCM driver is fabricated using a commercial 0.18μm CMOS technology. As the result, the chip shows the fast speed enough to operate with 30-fps image signal processor and the quiescent current consumption of 0.32-mA.

Original languageEnglish (US)
Title of host publication2005 IEEE Asian Solid-State Circuits Conference, ASSCC 2005
PublisherIEEE Computer Society
Pages101-104
Number of pages4
ISBN (Print)0780391624, 9780780391628
DOIs
StatePublished - Jan 1 2005
Externally publishedYes
Event1st IEEE Asian Solid-State Circuits Conference, ASSCC 2005 - Hsinchu, Taiwan, Province of China
Duration: Nov 1 2005Nov 3 2005

Publication series

Name2005 IEEE Asian Solid-State Circuits Conference, ASSCC 2005

Conference

Conference1st IEEE Asian Solid-State Circuits Conference, ASSCC 2005
CountryTaiwan, Province of China
CityHsinchu
Period11/1/0511/3/05

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

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