A Zero-Pole Reposition Based, 0.95-mW, 68-dB, Linear-in-dB, Constant-Bandwidth Variable Gain Amplifier

Baghtash, Hassan Faraji; Ayatollahi, Ahmad

doi:10.1007/s00034-013-9705-1

Cited by 14 publications

(5 citation statements)

References 17 publications

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“…The proposed circuit also presents a new concept of ZPR technique, where, the position of zero-pole pair is controlled digitally instead of continuously. The proposed circuit also presents lower power consumption and wider tuning range compared to the work [19] but at lower cutoff frequency.…”

Section: Introductionmentioning

confidence: 92%

“…In fact, the function of circuit relies on continuously changing the cutoff frequency of a high-pass filter, which is cascaded [19] is very promising but there are some issues which the circuit cannot satisfies perfectly. Firstly, the circuit fails to preserve its constant bandwidth characteristic in wide range of gain settings, particularly, when the gain value increases to its very end values.…”

Section: Introductionmentioning

confidence: 99%

“…To date much efforts have been made to overcome the design challenges related to VGAs, and, as a result, numerous brilliant works have emerged [19]. For example, to overcome the limited tuning range and non-linearity problems related to feedback tuning technique, a differential ramp based technique was introduced in [17]; and, to improve the linearity performance of a source degenerated VGA, a load degeneration technique was introduced in [2].…”

Section: Introductionmentioning

confidence: 99%

“…In [19] the authors have proposed a VGA based on novel zero-pole repositioning (ZPR) gain control technique. In fact, the function of circuit relies on continuously changing the cutoff frequency of a high-pass filter, which is cascaded [19] is very promising but there are some issues which the circuit cannot satisfies perfectly.…”

Section: Introductionmentioning

confidence: 99%

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A 0.74 mW, linear-in-dB, constant bandwidth, variable gain amplifier based on zero-pole repositioning technique

Baghtash

2015

Analog Integr Circ Sig Process

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A zero-pole repositioning based variable gain amplifier is presented in this paper. The operational principle of this unique structure is discussed, its most important formulas are derived and its outstanding performance is verified by simulation in TSMC 0.18 lm standard CMOS technology. Owing to the cutting-edge structure, the proposed circuit demonstrates a very low power consumption of 0.74 mW and a wide tuning range of 83 dB. The proposed structure benefits from linear-in-dB and constant bandwidth specifications. The linear-in-dB gain range of structure is about 70 dB. The structure draws about 413 lA from 1.8 V power supply and regarding this low power consumption, it shows a lower and upper 3-dB cutoff frequencies of 8 Hz and 8.1 MHz, respectively. Process and temperature variation analysis of the circuit is also investigated through Monte Carlo and corner case analysis in order to verify the well-robustness of the structure. The transient sinusoidal response analysis is also done to verify the proposed VGA's stability.

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Section: Introductionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A 0.74 mW, linear-in-dB, constant bandwidth, variable gain amplifier based on zero-pole repositioning technique

Baghtash

2015

Analog Integr Circ Sig Process

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“…ULP transceivers are required for implantable sensors and surgical procedures in the sub-mW supply operation for usage of energy harvesters and wireless power transfer modules [9,10]. To achieve ULP operation, on-off keying (OOK) combined with super-regenerative reception (SRR) is often used in ULP MICS transceivers [11][12][13][14][15][16] with very low energy per bit ratios from 4.2nJ/b down to 0.18nJ/b [15,16]. The main operating principle is to switch off the transceiver when no data transfer occurs.…”

Section: Introductionmentioning

confidence: 99%

ULP Super Regenerative Transmitter with Digital Quenching Signal Controller

Kayed¹,

Saleh²,

Shawkey³

2022

Preprint

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This paper demonstrates an on-off keying (OOK) super-regenerative quenching transmitter operating in 402- 405MHz MICs band applications. To reduce power consumption, the transmitter is controlled by a novel digital quenching signal controller that generates a digital control signal to start transmitter operation when a baseband signal is input to the transmitter. The digital signal controller consists of an envelope detector, a comparator, and a quench timer designed using a state machine to synchronize the operation between the digital controller and the input baseband signal. The transmitter consists of a Colpitts oscillator operating in double operating frequency followed by a frequency divider by 2, this configuration reduces system area and improves phase noise and signal spectrum. The proposed transmitter is implemented using UMC 130nm CMOS technology, and a 1.2V supply. Simulation shows that the proposed transmitter can meet MICS band mask specifications with data rates up to 1Mbps and total power dissipation of 537uW.

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A 6–18 GHz high dB‐linear attenuator based on variable gain amplifier for ultra‐wideband phased array systems

Wang

Wang³

et al. 2021

Micro & Optical Tech Letters

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The letter presents a high dB-linear attenuator based on variable gain amplifier (VGA) for ultra-wideband phased array systems. An effective dB-linear compensation structure is proposed to improve the gain range and accuracy. The bandwidth and gain flatness of the proposed VGA are increased by the emitter resistor-capacitor negative feedback and transistor segmentation technique. The proposed VGA is implemented with the 0.18 μm SiGe bipolar complementary metal oxide semiconductor (BiCMOS) process. The measured results show that the VGA can operate from 6 to 18 GHz with a controlled variable gain range of 20 dB, the root-mean-square gain error is less than 0.55 dB. The input 1 dB compression point (IP1dB) of the fabricated VGA is more than À5 dBm. The proposed VGA consumes 71 mW and occupies a chip area of 0.98 mm Â 0.98 mm.

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A Zero-Pole Reposition Based, 0.95-mW, 68-dB, Linear-in-dB, Constant-Bandwidth Variable Gain Amplifier

Cited by 14 publications

References 17 publications

A 0.74 mW, linear-in-dB, constant bandwidth, variable gain amplifier based on zero-pole repositioning technique

A 0.74 mW, linear-in-dB, constant bandwidth, variable gain amplifier based on zero-pole repositioning technique

ULP Super Regenerative Transmitter with Digital Quenching Signal Controller

A 6–18 GHz high dB‐linear attenuator based on variable gain amplifier for ultra‐wideband phased array systems

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