A 10-b Two-Stage DAC with an Area-Efficient Multiple-Output Voltage Selector and a Linearity-Enhanced DAC-Embedded Op-Amp for LCD Column Driver ICs

This work proposes a 10-b two-stage DAC with an area-efficient multiple-output voltage selector and a linearity-enhanced DAC-embedded op-amp for LCD column driver ICs. The proposed voltage selector is divided into two stages, MSB and LSB decoders; this design requires fewer switches compared with tree-type voltage selectors, enabling a smaller die area. The proposed 6-b two-voltage selector occupies only 61% of the area needed for a 6-b tree-type two-voltage selector. This study also develops a generalized architecture for an area-efficient voltage selector for multiple outputs. To improve the linearity of the DAC-embedded op-amp, the differential pairs operate at the edge of the saturation region. The 10-b DAC prototypes were produced with 0.35- μm/0.5- μm CMOS technology with the worst DNL/INL being 0.44/0.58 LSB.

[1]  Oh-Kyong Kwon,et al.  10‐bit source driver with resistor‐resistor‐string digital‐to‐analog converter , 2006 .

[2]  Deog-Kyoon Jeong,et al.  A multi-level multi-phase charge-recycling method for low-power AMLCD column drivers , 2000, IEEE Journal of Solid-State Circuits.

[3]  Wei-Chih Chen,et al.  An Area-Efficient Fully R-DAC-Based TFT-LCD Column Driver , 2010, IEEE Transactions on Circuits and Systems I: Regular Papers.

[4]  Chih-Wen Lu,et al.  A 10-Bit LCD Column Driver With Piecewise Linear Digital-to-Analog Converters , 2008, IEEE Journal of Solid-State Circuits.

[5]  Chih-Wen Lu,et al.  High-speed driving scheme and compact high-speed low-power rail-to-rail class-B buffer amplifier for LCD applications , 2004, IEEE J. Solid State Circuits.

[6]  Stilianos Siskos,et al.  A Fast and Compact Analog Buffer Design for Active Matrix Liquid Crystal Displays Using Polysilicon Thin-Film Transistors , 2008, IEEE Transactions on Circuits and Systems II: Express Briefs.

[7]  Shen-Iuan Liu,et al.  A Rail-to-Rail Class-B Buffer With DC Level-Shifting Current Mirror and Distributed Miller Compensation for LCD Column Drivers , 2011, IEEE Transactions on Circuits and Systems I: Regular Papers.

[8]  Davide Marano,et al.  A New Compact Low-Power High-Speed Rail-to-Rail Class-B Buffer for LCD Applications , 2010, Journal of Display Technology.

[9]  Roubik Gregorian,et al.  Introduction to CMOS OP-AMPs and Comparators , 1999 .

[10]  Oh-Kyong Kwon,et al.  10-bit Driver IC Using 3-bit DAC Embedded Operational Amplifier for Spatial Optical Modulators (SOMs) , 2007, IEEE Journal of Solid-State Circuits.

[11]  R.J. Bowman,et al.  A Low Power, Scalable, DAC Architecture for Liquid Crystal Display Drivers , 2009, IEEE Journal of Solid-State Circuits.

[12]  T. Itakura,et al.  A Class AB Amplifier for LCD Driver , 2007, 2007 IEEE Symposium on VLSI Circuits.

[13]  Ron Hogervorst,et al.  A compact power-efficient 3 V CMOS rail-to-rail input/output operational amplifier for VLSI cell libraries , 1994 .

[14]  Hyung-Min Lee,et al.  A piecewise-linear 10b DAC architecture with drain-current modulation for compact AMLCD driver ICs , 2009, 2009 IEEE International Solid-State Circuits Conference - Digest of Technical Papers.

[15]  Suhwan Kim,et al.  High-speed 10-bit LCD column driver with a split DAC and a class-AB output buffer , 2009, IEEE Transactions on Consumer Electronics.

[16]  Hyung-Min Lee,et al.  A Piecewise Linear 10 Bit DAC Architecture With Drain Current Modulation for Compact LCD Driver ICs , 2009, IEEE Journal of Solid-State Circuits.

[17]  Mau-Chung Frank Chang,et al.  A 10-bit Resistor-Floating-Resistor-String DAC (RFR-DAC) for High Color-Depth LCD Driver ICs , 2012, IEEE Journal of Solid-State Circuits.

[18]  M. Bell.  An LCD column driver using a switch capacitor DAC , 2005, IEEE Journal of Solid-State Circuits.

[19]  Gyu-Hyeong Cho,et al.  A Column Driver with Low-Power Area-Efficient Push-Pull Buffer Amplifiers for Active-Matrix LCDs , 2007, 2007 IEEE International Solid-State Circuits Conference. Digest of Technical Papers.

[20]  Hyung-Min Lee,et al.  A 10b column driver with variable-current-control interpolation for mobile active-matrix LCDs , 2009, 2009 IEEE International Solid-State Circuits Conference - Digest of Technical Papers.

[21]  Oh-Kyong Kwon,et al.  A 10b Driver IC for a Spatial Optical Modulator for Full HDTV Applications , 2007, 2007 IEEE International Solid-State Circuits Conference. Digest of Technical Papers.

[22]  Dong-Hun Lee,et al.  A Compact Low-Power CDAC Architecture for Mobile TFT-LCD Driver ICs , 2008, 2008 IEEE International Solid-State Circuits Conference - Digest of Technical Papers.

[23]  Chien-Hung Tsai,et al.  Cross-Self-Bias Rail-to-Rail Column Buffer for 640-Channel 6-Bit TFT-LCD , 2011, Journal of Display Technology.

[24]  Mau-Chung Frank Chang,et al.  A 10b resistor-resistor-string DAC with current compensation for compact LCD driver ICs , 2011, 2011 IEEE International Solid-State Circuits Conference.