Design of a low power time-gain-compensation amplifier for a 2D piezoelectric ultrasound transducer

Yao, Jiaxin; Yu, Zili; Pertijs, Michiel A. P.; Meijer, G.C.M.; Lancée, C.T.; Bosch, Johannes G.; Jong, Nico de

doi:10.1109/ultsym.2010.5935775

Cited by 8 publications

(9 citation statements)

References 4 publications

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“…The TGC amplifier consists of a voltage-to-current converter, whose transconductance is defined using a switchable resistance, followed by a current-to-voltage converter, consisting of a resistor and a source-follower buffer [3,19]. The gain is thus accurately defined using a resistor ratio and can be programmed in four steps between 0 dB and 40 dB.…”

Section: Sub-arraymentioning

confidence: 99%

Low-power receive electronics for a miniature real-time 3D ultrasound probe

Pertijs

Chen

Raghunathan

et al. 2015

2015 6th International Workshop on Advances in Sensors and Interfaces (IWASI)

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Transesophageal echocardiography (TEE) involves the use of an ultrasound transducer mounted at the tip of an endoscope to make ultrasonic images of the human heart from the esophagus. In conventional TEE probes, each transducer element is wired-out by a micro-coaxial cable to an external imaging system. To obtain real-time three-dimensional images, however, a two-dimensional transducer array with more than 1000 elements is required. Direct wiring of so many elements through an endoscope is not feasible, so channel reduction should be performed locally. In this paper, we present an applicationspecific integrated circuit (ASIC) that includes low-noise amplifiers, programmable-gain amplifiers and microbeamformer circuits that locally process and combine the signals received by sub-groups of the transducer array. Thus, an orderof-magnitude channel reduction is achieved. The acoustic characterization of the prototype ASIC with a co-integrated transducer array will be presented.

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Section: Sub-arraymentioning

confidence: 99%

Low-power receive electronics for a miniature real-time 3D ultrasound probe

Pertijs

Chen

Raghunathan

et al. 2015

2015 6th International Workshop on Advances in Sensors and Interfaces (IWASI)

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“…The proposed TOC amplifier consists of a voltage-to current (VII) converter, a current-to-voltage (l1V) converter and a source-follower buffer [1] [4]. A simplified circuit diagram is shown in Fig.…”

Section: Tgc Amplifier Designmentioning

confidence: 99%

“…Finally, the output differential voltages are buffered by source followers (MZA, MzB) to drive the input capacitances (CL) of the micro-beamformer. To improve the gain accuracy of the VII conversion and to eliminate errors due to the on-resistance of the MOSFET switches, a cascoded flipped-voltage-follower (CASFVF) structure and Kelvin connections are applied [2] [4], which are not shown in Fig. 3.…”

Section: Tgc Amplifier Designmentioning

confidence: 99%

“…Each sub-group consists of 3 x 3 elements and has 9 low-noise amplifiers (LNAs), 9 time-gain-compensation (TGC) amplifiers and 1 micro-beamformer. For the TGC 978-1-4673-4562-0/12/$31.00 mOl2 IEEE 2063 scheme, instead of using a continuous compensation scheme, the use of a four-step discrete-gain scheme [4] highly simplifies the circuit design. For the micro-beamforming scheme, the "pre-steering" technique [1] is employed, which allows the sharing of one delay configuration among all 225 sub-groups.…”

Section: Introductionmentioning

confidence: 99%

“…In [4], we proposed a TGC amplifier topology, which uses local-feedback topology to achieve a high bandwidth while keeping the power consumption low. In [5], a power-efficient micro-beamformer with pipeline-operated sample-and-hold (SIH) delay lines and charge-mode signal summation has been proposed.…”

Section: Introductionmentioning

confidence: 99%

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A 9-channel low-power receiver ASIC for 3D transesophageal echocardiography

Blaak²,

Prins³

et al. 2012

2012 IEEE International Ultrasonics Symposium

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This paper presents a 9-channel low-power receiver ASIC dedicated to a matrix piezoelectric ultrasound transducer for 3D Trans-Esophageal Echocardiography (TEE). It consists of 9 low-noise amplifiers (LNAs), 9 time-gain-compensation (TGC) amplifiers and a 9:1 micro-beamformer. A prototype ASIC has been implemented in 0.35 J.Im CMOS technology, with a core area of 0.98 mm x 1.7 mm. It is operated at a 3.3 V supply and consumes only 0.5 mW per channel. The measured channel-to channel mismatch is within ±1 dB. Acoustic measurements proved the micro-beamforming function of the ASIC when processing real ultrasound signals from a 3 x 3 transducer array.These promising results show that this design, after layout optimization, is suitable to be scaled up to accommodate a full matrix transducer.

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A low power CMOS programmable gain amplifier employing positive feedback technique

Firouz

Aghdam

Jafarnejad

2022

Circuit Theory & Apps

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This paper presents a low power CMOS programmable gain amplifier (PGA) utilizing a novel gm‐boosting technique to increase the maximum achievable DC gain. The structure increases the effective transconductance of the circuit without any additional elements. The gain enhancement is accomplished without increasing the power consumption. The variable gain function is achieved by varying the effective transconductance of the circuit and its output resistance. The proposed PGA achieves a wide gain range of 47.5 dB from 2.1 to 49.6 dB with a constant bandwidth. According to the post‐layout simulation results of the proposed circuit in 0.18‐μm TSMC CMOS process the bandwidth and the input referred noise voltage at the maximum gain are 11.3 MHz and 10.76 nV/sqrt (Hz), respectively. The second and third harmonic distortions of the proposed PGA at the minimum gain are less than −72.4 and −40.7 dB, respectively. The core circuit of proposed PGA draws only 164 μA from a 1.2‐V supply voltage occupying an area of 29 μm * 26 μm.

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Design of a low power time-gain-compensation amplifier for a 2D piezoelectric ultrasound transducer

Cited by 8 publications

References 4 publications

Low-power receive electronics for a miniature real-time 3D ultrasound probe

Low-power receive electronics for a miniature real-time 3D ultrasound probe

A 9-channel low-power receiver ASIC for 3D transesophageal echocardiography

A low power CMOS programmable gain amplifier employing positive feedback technique

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