I-Q signal generation techniques for communication IC testing and ATE systems

This paper describes application of a complex band-pass (BP) ΔΣ DA modulator to I-Q signal generation for I-Q balance testing of communication IC as well as ATE system usage. First we explain that the complex BP ΔΣ DA modulator is superior to two real-BP ΔΣ DA modulators regarding to noise-shaping characteristics. Then we examine the characteristics of the complex BP ΔΣ DA modulator and its extension - a complex multi-BP modulator - as well as its newly derived Data Weighted Averaging (DWA) algorithm for its linearity enhancement. We also propose a digital self-calibration technique, and show their simulation results. Their combination is also investigated. We discuss application of our proposed techniques to IC testing.

[1]  Peter Sarson.  RF filter characterization using a chirp , 2014, 2014 9th International Design and Test Symposium (IDT).

[2]  K. Mashiko,et al.  A Second-Order Multibit Complex Bandpass ∆ΣAD Modulator with I, Q Dynamic Matching and DWA Algorithm , 2007 .

[3]  A Noise-Shaping Algorithm of Multi-bit DAC Nonliearities in Complex Bandpass ∆ΣAD Modulators , 2003 .

[4]  K. Martin,et al.  Complex signal processing is not-complex , 2003, The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04..

[5]  T. Kitahara,et al.  Explicit transfer function of RC polyphase filter for wireless transceiver analog front-end , 2002, Proceedings. IEEE Asia-Pacific Conference on ASIC,.

[6]  Toshiro Tsukada,et al.  A Second-Order Multibit Complex Bandpass DeltaSigmaAD Modulator with I, Q Dynamic Matching and DWA Algorithm , 2007, IEICE Trans. Electron..

[7]  Haruo Kobayashi,et al.  Linearity enhancement algorithms for I-Q signal generation — DWA and self-calibration techniques , 2015, 2015 IEEE 11th International Conference on ASIC (ASICON).

[8]  Kobayashi Haruo.  Digitally-Assisted Analog Test Technology -- Analog Circuit Test Technology in Nano-CMOS Era , 2010 .

[9]  Haruo Kobayashi,et al.  Multitone Curve-Fitting Algorithms for Communication Application ADC Testing , 2003 .

[10]  Haruo Kobayashi,et al.  Mapping from a DWA Algorithm into Circuit for Multi-bit Complex Bandpass ∆ΣAD Modulators , 2006 .

[11]  Gabor C. Temes,et al.  Understanding Delta-Sigma Data Converters , 2004 .

[12]  Haruo Kobayashi,et al.  Reducing spurious output of balanced modulators by dynamic matching of I, Q quadrature paths , 2004 .

[13]  A. Wada,et al.  A Multibit Complex Bandpass AZAD Modulator with I, Q Dynamic Matching and DWA Algorithm , 2006, 2006 IEEE Asian Solid-State Circuits Conference.