Detail publikačního výsledku

The New Background Calibration Technique for Pipelined ADC Using Switched-capacitor Approach

HÁZE, J.; VRBA, R.

Original Title

The New Background Calibration Technique for Pipelined ADC Using Switched-capacitor Approach

English Title

The New Background Calibration Technique for Pipelined ADC Using Switched-capacitor Approach

Type

Paper in proceedings (conference paper)

Original Abstract

The paper deals with new background calibration technique, which is utilized in new 12-bit low power pipelined ADC. The switched-capacitor approach is used in designed ADC as well. Since portable applications demand for low power consumption, it is one of the most important issues considered in the design. A modified operational-amplifier (op-amp) sharing technique was used to decrease the power usage as well as capacitor scaling approach. To avoid the clock feedthrough from digital part through the switches, the fully differential circuitry was utilized. The special op-amps and comparators were designed for this purpose and to obtain large bandwidth. The power consumption of the op-amps was taken into account too. The finite op-amp dc gain problem is solved in digital-domain using background calibration. The capacitor mismatch and op-amp offset are compensated in the same manner.

English abstract

The paper deals with new background calibration technique, which is utilized in new 12-bit low power pipelined ADC. The switched-capacitor approach is used in designed ADC as well. Since portable applications demand for low power consumption, it is one of the most important issues considered in the design. A modified operational-amplifier (op-amp) sharing technique was used to decrease the power usage as well as capacitor scaling approach. To avoid the clock feedthrough from digital part through the switches, the fully differential circuitry was utilized. The special op-amps and comparators were designed for this purpose and to obtain large bandwidth. The power consumption of the op-amps was taken into account too. The finite op-amp dc gain problem is solved in digital-domain using background calibration. The capacitor mismatch and op-amp offset are compensated in the same manner.

Keywords

Pipelined ADC, switched-capacitors, background calibration, portable devices

Key words in English

Pipelined ADC, switched-capacitors, background calibration, portable devices

Authors

HÁZE, J.; VRBA, R.

Released

01.01.2005

Publisher

IMAPS CS

Location

Brno

ISBN

80-214-2990-9

Book

Proceedings of Electronic Devices and Systems IMAPS CS International Conference 2005

Pages from

369

Pages count

7

Full text in the Digital Library

http://hdl.handle.net/

BibTex

@inproceedings{BUT15262,
  author="Jiří {Háze} and Radimír {Vrba}",
  title="The New Background Calibration Technique for Pipelined ADC Using Switched-capacitor Approach",
  booktitle="Proceedings of Electronic Devices and Systems IMAPS CS International Conference 2005",
  year="2005",
  pages="7",
  publisher="IMAPS CS",
  address="Brno",
  isbn="80-214-2990-9"
}