Calibration for Realization Errors of Two-Channel Hybrid Filter Bank Analog-to-Digital Converters Based on Frequency-Dependent Model

Liu, Su Juan; Wang, Jun Shan; Qi, Pei Pei

doi:10.1007/s00034-013-9657-5

Cited by 6 publications

(4 citation statements)

References 15 publications

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“…In fact, the aliasing terms need not be completely eliminated and it is sufficient that these terms can be optimized to be small enough to accommodate the required system SNDR of target application. To minimize the reconstruction error, several optimization methods have been proposed to design the digital synthesis filters [19], [20], [21].…”

Section: B Synthesis Filter Designmentioning

confidence: 99%

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A Boundary Mixing Architecture for Two-Channel Frequency-Interleaving Analog-to-Digital Converters

Qiu

2023

IEEE Access

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Multi-channel parallel interleaving in the time or frequency domain is a promising architecture to improve the sampling rates of analog-to-digital converters (ADCs) in the medium-to-high resolution data acquisition system. However, the timing interleaving (TI) structure fails to scale up the bandwidth with the more channels, since the input capacitance of the system will increase with more parallel channels, resulting in the decrease of the acquisition bandwidth and the increase of the power consumption. In the mixer-based frequency interleaving (FI) design, this problem is solved at the expense of introducing incomplete image rejection and complexed hardware implementation. In this paper, a boundary mixing (BM) architecture for two-channel frequency-interleaving (FI) ADCs is proposed. In this architecture, the first channel does not require frequency translation and an analog mixer with zero-frequency local oscillator (LO) is adopted to compensate for the propagation delay. The second channel utilizes a real-valued mixer rather than a complex one with an LO of half the sampling frequency of the sampling system. Such a mixing technique shifts wideband input signals into two baseband signals and then decompose the baseband into narrower sub-bands through two identical low-order low-pass filters, limiting the need for high-order analog analysis filters. Further, the effects of some major realization errors are discussed. The simulation results show that, for a BM system with 12-bit subchannel ADCs and third-order Butterworth filters, more than 11 bits of the resolution are attainable everywhere in the desired band with 64-tap finite-impulse response reconstruction filters.INDEX TERMS Analog-to-digital converters (ADCs), boundary mixing (BM), frequency-interleaving (FI), wideband.

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Section: B Synthesis Filter Designmentioning

confidence: 99%

“…Assuming mth analog LPF has L such parameters l m,i (e.g. resistance, capacitance, inductance or characteristic parameter in transistor), the frequency response of the mth LPF can be modeled as [19]…”

Section: Analog Low-pass Filter Imperfectionsmentioning

confidence: 99%

A Boundary Mixing Architecture for Two-Channel Frequency-Interleaving Analog-to-Digital Converters

Qiu

2023

IEEE Access

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“…HFB is widely used to analysis time interleaved Analog-to-Digital Converter (TIADC) [16,17,18,19] while the HFB DAC is relatively less studied. Since the mismatch errors of filter banks significantly degrade the system performance [20,21,22,23]. Many studies [24,25,26,27] focus on the perfect reconstruction design of filter banks while the mismatch estimation and calibration are relatively less studied.…”

Section: Introductionmentioning

confidence: 99%

An estimation method of timing mismatch error in hybrid filter bank DACs

Yin

Tian

Liu

et al. 2020

IEICE Electron. Express

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This paper presents an estimation method of timing mismatch error in hybrid filter bank digital-to analog converter (HFB DAC). An approximated transfer function of HFB DAC with timing mismatch is derived based on the Taylor series. Then an iteration method is introduced to approach the timing error. Besides, we analyze the influence of test signal and give the requirements on test input. Using this signal, the iteration will have a fast convergence speed. Simulation experiments show the effectiveness of the proposed estimation method.

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“…The HFB system suffer from the aliasing error if the analysis filters and synthesis filters are not well matched [17,18,19,20,21]. Several filter match design methods such as linear programming [22], second-order cone programming [23] have been proposed to eliminate the aliasing error and minimize the distortion.…”

Section: Introductionmentioning

confidence: 99%

Optimization of synthesis filters for hybrid filter bank DACs

Yin

Tian

Liu

et al. 2019

IEICE Electron. Express

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Hybrid filter bank (HFB) is a promising technology that both improve the resolution and speed of digital-to-analog conversion. In this letter, we present a wideband waveform generation method using HFB architecture. Mixers are adopted to break through the limitation caused by zero-order-hold (ZOH) of DACs. However, the imperfect match of analysis filters and synthesis filters significantly degrade the system performance. To solve this problem, we analyze the influence of filter mismatch. An analysis filter design based on weighted least squares (WLS) and an optimization design for synthesis filter is presented. The optimization method invokes the WLS method at each iteration. Performance evaluation shows that these two methods work together and perform a better reconstruction system than the WLS method which just focus on analysis filter bank.

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Calibration for Realization Errors of Two-Channel Hybrid Filter Bank Analog-to-Digital Converters Based on Frequency-Dependent Model

Cited by 6 publications

References 15 publications

A Boundary Mixing Architecture for Two-Channel Frequency-Interleaving Analog-to-Digital Converters

A Boundary Mixing Architecture for Two-Channel Frequency-Interleaving Analog-to-Digital Converters

An estimation method of timing mismatch error in hybrid filter bank DACs

Optimization of synthesis filters for hybrid filter bank DACs

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