Estimation circuit for time-interleaved ADC and method thereof
Patent 7253762 Issued on August 7, 2007. Estimated Expiration Date: 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.
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.