A Quadrature Charge-Domain Sampler With Embedded FIR and IIR Filtering Functions

Karvonen, S.; Riley, T.A.D.; Kurtti, Sami; Kostamovaara, J.

doi:10.1109/jssc.2005.857357

Cited by 33 publications

(20 citation statements)

References 8 publications

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“…10). Therefore, we find the DT differential output noise PSD as (18) Since the absolute value of four input sources are the same, (18) can be simplified as (19) and by substituting , the differential output noise PSD is simplified to (20). (See equation at the bottom of the page.)…”

Section: B Dt Cs-bpf Noise Modelmentioning

confidence: 99%

“…7 can be calculated based on the same approach; DT noise PSD derived in (20). We find the total CT differential output noise PSD as It should be pointed out that integrating the DT differential output noise PSD in (20) over 0-toyields , with being the total differential output capacitance equal to . On the other hand, integrating the CT noise PSD in (21) over the entire range of 0 to is again equal to , with .…”

Section: B Dt Cs-bpf Noise Modelmentioning

confidence: 99%

“…12 compares the total output spot noise plots obtained via the diverse means: calculated DT, based on (20); calculated CT, based on (21); and schematic-simulated DT. The following conditions are used: , , and .…”

Section: B Dt Cs-bpf Noise Modelmentioning

confidence: 99%

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Analysis and Design of I/Q Charge-Sharing Band-Pass-Filter for Superheterodyne Receivers

Madadi

Tohidian

Staszewski

2015

IEEE Trans. Circuits Syst. I

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A complex quadrature charge-sharing (CS) technique is proposed to implement a discrete-time band-pass filter (BPF) with a programmable bandwidth of 20-100 MHz. The BPF is part of a cellular superheterodyne receiver and completely determines the receiver frequency selectivity. It operates at the full sampling rate of up to 5.2 GHz corresponding to the 1.2 GHz RF input frequency, thus making it free from any aliasing or replicas in its transfer function. Furthermore, the advantage of CS-BPF over other band-pass filters such as N-path, active-RC, -, and biquad is described. A mathematical noise analysis of the CS-BPF and the comparison of simulations and calculations are presented. The entire 65 nm CMOS receiver, which does not include a front-end LNTA for test reasons, achieves a total gain of 35 dB, IRN of , out-of-band IIP3 of 10 dBm. It consumes 24 mA at 1.2 V power supply.

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Section: B Dt Cs-bpf Noise Modelmentioning

confidence: 99%

Section: B Dt Cs-bpf Noise Modelmentioning

confidence: 99%

See 1 more Smart Citation

Analysis and Design of I/Q Charge-Sharing Band-Pass-Filter for Superheterodyne Receivers

Madadi

Tohidian

Staszewski

2015

IEEE Trans. Circuits Syst. I

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“…To lay the foundation in those lines, we propose a charge sampling architecture as an ultrasound analog front-end. Recently, charge sampling has been demonstrated as an attractive alternative compared to the usual well known voltage sampling in high speed applications, even with low supply voltages [19][20][21][22][23][24]. Charge sampling has also been proved to have better immunity to clock jitter for certain ranges of input signal frequency [25][26][27] and better performance at high speed and low voltage operation compared to voltage sampling [19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

“…Recently, charge sampling has been demonstrated as an attractive alternative compared to the usual well known voltage sampling in high speed applications, even with low supply voltages [19][20][21][22][23][24]. Charge sampling has also been proved to have better immunity to clock jitter for certain ranges of input signal frequency [25][26][27] and better performance at high speed and low voltage operation compared to voltage sampling [19][20][21][22][23][24]. Although high speed charge integrating mode architectures [23,28,29] have been reported, these were not used as ultrasound front-ends and also were not designed in stateof-the-art deep submicron technologies.…”

Section: Introductionmentioning

confidence: 99%

Inverter-based 1 V analog front-end amplifiers in 90 nm CMOS for medical ultrasound imaging

Reddy

Singh

Ytterdal

2010

Analog Integr Circ Sig Process

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In this paper, we present the design and experimental evaluation of 1 V analog front-end amplifiers designed in 90 nm CMOS technology for capacitive micromachined ultrasound transducers (CMUTs) for medical ultrasound imaging systems. We propose two front-end amplifier topologies based on an inverter-based cascode amplifier; the first is a continuous time amplifier and the second is a charge sampling amplifier (CSA). The proposed front-end amplifiers are designed to amplify the signals from CMUTs in the frequency bandwidth from 15 to 45 MHz with a centre frequency of 30 MHz. From the measurements, the continuous time single-ended transimpedance amplifier achieves a voltage gain of 19 dB, an output noise power spectral density of 0.042 (lV)/ SQRT(Hz) at a centre-frequency of 30 MHz, and a total harmonic distortion of -23 dB at 450 mV p-p output voltage at 30 MHz input signal frequency. It draws only 598 lA per amplifier from a 1 V power supply. Its area measured only about 32 lm 9 32 lm per amplifier. On the other hand, a sampling based front-end amplifier [CSA] achieves a transfer gain of 17.4 dB at an input signal frequency of 30 MHz and an upper 3 dB cut-off frequency of 46 MHz at a sampling clock frequency of 100 MHz. It consumes 586 lA per amplifier from a 1 V power supply and achieves a signal-to-noise (SNR) ratio of 45.7 dB with a peak-to-peak output signal amplitude of 500 mV at a sampling frequency of 100 MHz. It occupies an area of 1470.2 lm 2 (which is equivalent to 38 lm 9 38 lm), which also includes the area of the switches for the CSA that will be used for the single CMUT element.

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Baseband Analog Circuits for Software Defined Radio

Giannini¹,

Craninckx²,

Baschirotto³

2008

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A Quadrature Charge-Domain Sampler With Embedded FIR and IIR Filtering Functions

Cited by 33 publications

References 8 publications

Analysis and Design of I/Q Charge-Sharing Band-Pass-Filter for Superheterodyne Receivers

Analysis and Design of I/Q Charge-Sharing Band-Pass-Filter for Superheterodyne Receivers

Inverter-based 1 V analog front-end amplifiers in 90 nm CMOS for medical ultrasound imaging

Baseband Analog Circuits for Software Defined Radio

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