An embedded Dynamic Voltage Scaling (DVS) system through 55 nm Single-Inductor Dual-Output (SIDO) switching converter for 12-bit video digital-to-analog converter

Wen Shen Chou*, Tzu Chi Huang, Yu Huei Lee, Yao Yi Yang, Yi Ping Su, Ke-Horng Chen, Chen Chih Huang, Ying Hsi Lin, Chao Cheng Lee, Kuei-Ann Wen, Ying Chih Hsu, Yung Chow Peng, Fu Lung Hsueh

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

This paper proposes a 55 nm CMOS 12-bit current-steering video digital-to-analog converter (DAC) directly powered by the single-inductor dual-output (SIDO) switching converter to compose a dynamic voltage scaling (DVS) system and improve the power efficiency. Dual-DVS control in both digital and analog circuits can effectively reduce power consumption. With various supply voltages, the video DAC can meet several different specifications in the power optimized (PO) mode. Furthermore, for DAC, the proposed 3S method, including finger separating, splitting and shifting, achieves good differential nonlinearity (DNL) performance to 0.78/0.4 least significant bit (LSB) and integral nonlinearity (INL) 1.3/1.0 LSB (with/without SIDO converter) without additional calibration. It also suppresses the switching noise interference from the SIDO converter. Moreover, for SIDO converter, the cross-regulation performance is greatly improved in both transient and steady state to achieve lowest interference for the analog supply. The total power efficiency can be improved up to 11.5% and 28% in the DVS and the PO mode. The SIDO supplied DAC with the dual-DVS function achieves 69.88 dB spurious free dynamic range (SFDR) at the 1 V output swing and 1 MHz input. The proposed intrinsic 12-bit DAC and SIDO converter achieve high definition video DAC performance with the benefit of area and energy efficiency.

Original languageEnglish
Article number6222360
Pages (from-to)1568-1584
Number of pages17
JournalIEEE Journal of Solid-State Circuits
Volume47
Issue number7
DOIs
StatePublished - 3 Jul 2012

Keywords

  • DC-DC converter
  • differential nonlinearity (DNL)
  • digital to analog converter (DAC)
  • dynamic voltage scaling (DVS)
  • integral nonlinearity (INL)
  • least significant bit (LSB)
  • Single-inductor dual-output (SIDO)
  • spurious free dynamic range (SFDR)

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