A 250-MHz cutoff charge-domain baseband filter with improved stopband attenuations

Yoshizawa, Atsushi; Iida, Sachio

doi:10.1109/rfic.2009.5135587

Cited by 10 publications

(6 citation statements)

References 6 publications

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“…Mrizaei et al showed that anti-aliasing and low-pass filtering from charge-domain windowed sampling can be improved simultaneously by employing sinc 2 filtering [52,74,86]. Yoshizawa and Iida proposed a wide-band chargedomain baseband filter [87]. However, fixed-centre-frequency band-pass filter is still required in those receivers, making charge-domain sampling circuits less attractive for the increasing complexity of frequency bands.…”

Section: Motivation and Objectives For Charge-domain Sampling Circuits With Tunable Band-pass Filtermentioning

confidence: 99%

Injection-lock and reconfigurable charge-domain sampling mixers/filters for data communications over wireless channels.

Zhou¹

2021

Preprint

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This thesis provides a theoretical and experimental study of injection locking and reconfigurable charge-domain sampling mixers and filters for data communications over wireless channels. On injection-locking, the intrinsic relation between the characteristics of injection signals such as sinusoidal or square, single-tone or multi-tone, the type of oscillators under injection such as harmonic oscillators (passive or active LC oscillators) or non-harmonic oscillators (ring or relaxation oscillators), and the lock range of the oscillators under injection was investigated. For the very first time, we discovered the intrinsic relation between the lock range and the phase of multiple injections of harmonic oscillators. In addition, we obtained the closed-form expression of the lock range of harmonic oscillators with square-wave injections. Moreover, we obtained the distinct characteristics of the lock range of harmonic and non-harmonic oscillators and that of different types of non-harmonic oscillators. These theoretical findings were not known before and were validated using simulation results. On reconfigurable charge-domain sampling mixers and filters for software-defined radio, a novel quadrature charge-domain down-conversion sampling mixer with embedded finite-impulse-response (FIR), infinite-impulse-response (IIR), and 4-path bandpass filters was developed. An in-depth investigation of the principles of periodic impulse sampling, periodic windowed sampling, and periodic N-path windowed sampling was presented and a detailed mathematical treatment of charge-domain windowed samplers with built-in sinc, FIR and IIR filters was provided. The proposed quadrature charge-domain sampler with embedded FIR, IIR, and 4-path band-pass filters was implemented in IBM 130 nm 1.2V CMOS technology and its performance was validated both using simulation results and on-wafer measurement.

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Section: Motivation and Objectives For Charge-domain Sampling Circuits With Tunable Band-pass Filtermentioning

confidence: 99%

Injection-lock and reconfigurable charge-domain sampling mixers/filters for data communications over wireless channels.

Zhou¹

2021

Preprint

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“…Since we are only interested in the magnitude of the transfer function, it follows from (11) that the magnitude of the transfer function is (12) is sketched in Fig. 7.…”

Section: Wherementioning

confidence: 99%

“…High-order sinc can be employed to improve the aliasing rejection and attenuation [6]- [11]. Yoshizawa and Iida proposed a wide-band charge-domain baseband filter [12]. Recently, N-path filters widely popular in switched-capacitor band-pass filters have attracted a great interest to realize programmable high-Q band-pass filters [13]- [17].…”

mentioning

confidence: 99%

A Quadrature Charge-Domain Sampling Mixer With Embedded FIR, IIR, and N-Path Filters

Zhou

Filiol

Yuan

2015

IEEE Trans. Circuits Syst. I

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This paper presents the analysis and design of a quadrature charge-domain down-conversion sampling mixer with embedded finite-impulse-response (FIR), infinite-impulse-response (IIR), and 4-path bandpass filters. An in-depth investigation of the principles of periodic impulse sampling, periodic windowed sampling, and periodic N-path windowed sampling is presented and their characteristics are compared. A detailed mathematical treatment of charge-domain windowed samplers with built-in sinc, FIR and IIR filters is provided. A quadrature charge-domain sampler with embedded FIR, IIR, and 4-path band-pass filters is proposed and its performance including the effect of the non-idealities of devices is investigated. The proposed design is implemented in an IBM 130 nm 1.2 V CMOS technology. Simulation results demonstrate that the proposed design is tunable over 50-250 MHz frequency range. For an 100 MHz input, the proposed design exhibits 70 dB aliasing rejection, 60 dB stop band attenuation while consuming current of 145 . The performance of the proposed design is further validated using the results of on-wafer measurement of the fabricated microchip.Index Terms-Charge-domain windowed sampling, N-path filter, software-defied radio.

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“…However, this structure is adopted for low frequency, with sample frequency of 480 MHz. Besides, a discrete-time charge-domain FIR filter with zero splitting technique is reported [5]. With the sample frequency of 2 GHz, this filter achieves the cutoff frequency of 250 MHz, and an attenuation of 42 dB at 580 MHz.…”

Section: A Implementation Of the Fir Filtermentioning

confidence: 99%

“…Most reported FIR filter are implemented with several taps or low cutoff frequency (far below 1 GHz) [4] [5]. Different from the conventional FIR structures, the proposed FIR topology adopts the current steering pairs, which can realize 17-tap high-speed FIR filters.…”

Section: Introductionmentioning

confidence: 99%

A 17-tap 3.5 Gbps finite impulse response pulse shaping filter for 60 GHz transmitter with QPSK modulation

Zhao

Hellfeld

Wolf

et al. 2010

2010 Proceedings of ESSCIRC

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A 17-tap 3.5 Gbps finite impulse response (FIR) pulse shaping filter for 60 GHz transmitters with quadrature phaseshift keying (QPSK) modulation is presented. Measurement results show that an attenuation of 19 dB at 2.2 GHz is achieved with cutoff frequency of 1.76 GHz，which enable the 60 GHz transmitter to comply with the stringent spectrum mask requirement. No digital-to-analog converters (DACs) are needed in the proposed approach performed in the analog baseband. The dc power of 3.3 V × 300 mA (55 mA without buffers) is competitive compared to conventional DACs not providing filtering functionality. Implemented in a 0.25 μm SiGe HBT technology, the fully integrated circuit consumes an area of 1.6mm 2 .

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A 250-MHz cutoff charge-domain baseband filter with improved stopband attenuations

Cited by 10 publications

References 6 publications

Injection-lock and reconfigurable charge-domain sampling mixers/filters for data communications over wireless channels.

Injection-lock and reconfigurable charge-domain sampling mixers/filters for data communications over wireless channels.

A Quadrature Charge-Domain Sampling Mixer With Embedded FIR, IIR, and N-Path Filters

A 17-tap 3.5 Gbps finite impulse response pulse shaping filter for 60 GHz transmitter with QPSK modulation

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