U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Estimation circuit for time-interleaved ADC and method thereof

Patent 7253762 Issued on August 7, 2007. Estimated Expiration Date: Icon_subject April 12, 2026. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

Interleaved digitizer array with calibrated sample timing
Patent #: 4763105
Issued on: 08/09/1988
Inventor: Jenq

Digital equalization of time interleaved analog to digital converters
Patent #: 5239299
Issued on: 08/24/1993
Inventor: Apple, et al.

Timing and amplitude error estimation for time-interleaved analog-to-digital converters
Patent #: 5294926
Issued on: 03/15/1994
Inventor: Corcoran

High-speed waveform digitizer with a phase correcting means and a method therefor
Patent #: 6384756
Issued on: 05/07/2002
Inventor: Tajiri, et al.

A-D converting apparatus, and calibration unit and method therefor
Patent #: 6452518
Issued on: 09/17/2002
Inventor: Kawabata

Digitizer apparatus and semiconductor testing apparatus
Patent #: 6700515
Issued on: 03/02/2004
Inventor: Asami

Interleaving A/D conversion type waveform digitizer module and a test apparatus Patent #: 6809668
Issued on: 10/26/2004
Inventor: Asami

Inventors

Assignee

Application

No. 11279556 filed on 04/12/2006

US Classes:

341/155, Analog to digital conversion341/120, CONVERTER CALIBRATION OR TESTING341/118CONVERTER COMPENSATION

Examiners

Primary: Williams, Howard L.

Attorney, Agent or Firm

Foreign Patent References

  • 2000059219 JP 02/01/2000
  • 00456108 TW 09/01/2001

International Class

H03M 1/12

Abstract

The present invention provides an apparatus and a method for estimating at least one of timing, gain, and offset errors of a time-interleaved ADC. The apparatus has a first ADC, a second ADC, a converter, an estimator, and a compensator. The converter has a Fourier Transform converter and a calculator.

Other References

  • Antonio Petraglia and Sanjit K. Mitra., “Analysis of mismatch effects among A/D converters in a time-interleaved waveform digitizer.”, IEEE Trans on Instrum. and Meas., Oct. 1991, pp. 831-835, vol. 40, No. 5, 1991 IEEE.
  • Brad Booth et al, “IEEE 802 10GBASE-T Tutorial,”, Nov. 10, 2003, pp. 1-56.
  • D. Fu, et al., “A digital background calibration technique for time-interleaved analog-to-digital converters.”, IEEE J. of Solid-State Circuits, Dec. 1998, pp. 1904-1911, vol. 33, No. 12, 1998 IEEE.
  • Huawen Jin, Edward K. F. Lee, “A Digital-Background Calibration Technique for Minimizing Timing-Error Effects in Time-Interleaved ADC's.”, IEEE Trans. on Circuits and Systems-II: Analog and Digital Signal Processing, Jul. 2000, pp. 603-613, vol. 47, No. 7, 2000 IEEE.
  • J. Elbornsson et al, “Blind adaptive equalization of mismatch errors in a time-interleaved A/D converter system.” Trans. on Circuits and Systems-I: Regular Papers, Jan. 2004, pp. 151-158, vol. 51, No. 1, 2004 IEEE.
  • N. Kurosawa et al, “Explicit analysis of channel mismatch effects in time-interleaved ADC systems.” IEEE Trans. on Circuits and Systems-I: Fundamental Theory and Applications., Mar. 2001, pp. 261-271, vol. 48, No. 3, 2001 IEEE.
  • Yih-Chyun Jenq., “Digital Spectra of nonuniformly sampled signals: fundamentals and high-speed waveform digitizers.”, IEEE Trans. on Instrum. and Meas., Jun. 1988, pp. 245-251, vol. 37, No. 2, 1988 IEEE.
  • Yih-Chyun Jenq., “Digital spectra of nonuniformly sampled signals: A robust sampling time offset estimation algorithm for ultra high-speed waveform digitizers using interleaving.”. IEEE Trans. on Instrum. and Meas., Feb. 1990, pp. 71-75, vol. 39, No. 1 1990 IEEE.
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