A High-Voltage and Low-Noise Power Amplifier for Driving Piezoelectric Stack Actuators

Xu, Lisong; Li, Hongwen; Li, Pengzhi; Ge, Chuan

doi:10.3390/s20226528

Cited by 13 publications

(8 citation statements)

References 28 publications

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“…OPA544F is a power amplifier which amplifies the input small signal current. In order to reduce the amplifier loss, the input resistance R 5 value is a large [13] . The thermistor RT 1 is a kind of negative temperature coefficient resistor, whose resistance value decreases with the increase of temperature.…”

Section: System Circuit Designmentioning

confidence: 99%

Ethanol gas concentration detection system based on near infrared spectroscopy

Liao¹,

Zhang²,

Zuo³

et al. 2023

Ninth Symposium on Novel Photoelectronic Detection Technology and Applications

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Section: System Circuit Designmentioning

confidence: 99%

Ethanol gas concentration detection system based on near infrared spectroscopy

Liao¹,

Zhang²,

Zuo³

et al. 2023

Ninth Symposium on Novel Photoelectronic Detection Technology and Applications

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“…voltage output, therefore noise is not simulated in this analysis [25]. The current is calculated using the following equation:…”

Section: (B) the Valve Must Meet The Following Targetsmentioning

confidence: 99%

Simulation of a high frequency on/off valve actuated by a piezo-ring stack for digital hydraulics

et al. 2021

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Despite being widely used in several applications, commercially available spool valves, both servovalves and proportional valves, are inefficient components because they cause high power consumption due to the large pressure drops across the metering orifices. A recent research field aims at substituting spool valves with on/off valves having high switching frequency (changing state between open and closed in a few milliseconds or less) and producing low pressure drops, in order to make the so-called digital hydraulics possible. In spite of the advantages that it could provide, digital hydraulics does not have significative industrial applications yet, because of the difficulty in manufacturing such high frequency on/off valves. Hence, this paper performs a feasibility study of an on/off poppet-type valve actuated directly by a commercially available ring stack, which is a multilayer piezo-actuator capable of generating very high actuation forces needed for this application. Modulation of the average flow can be achieved by changing the duty cycle of the pulse width modulation (PWM) signal driving the piezostack. An inertance tube could also be used to smooth flow pulsation. The simulations obtained using a detailed Simulink model show that high switching frequency and very effective flow modulation can be obtained with this valve architecture along with low pressure drops and high flow rates, thus making it potentially suitable for digital hydraulics. The disadvantages of this single stage architecture are the large dimensions of the piezo stacks, and the high current generated because of both the high capacitance of the piezo stack and the high frequency switching. However, large-scale production of these components could help to reduce the costs, and the simulations show that limiting the maximum current to 10 A still provides good regulation.

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“…The idea of forming the unity-gain buffer with its output stage formed like in source followers but with a modified structure of its input stage is shown in the published research. The approach mentioned above and shown in [6] is a two-stage operational amplifier (OPAMP) with an output unity gain buffer that acts as the third and final power stage of the OPAMP. The input side of this buffer is simply submerged into the second gain stage of the OPAMP and it is formed by a single resistor responsible for proper biasing of both the output power stage transistors.…”

Section: Topology Of the Buffer 21 The Core Of The Buffermentioning

confidence: 99%

“…Unity-gain voltage buffers based on source followers are often used as output power buffers for high voltage amplifiers. They can form standalone structures as presented in [5], and because of their very short signal paths, they can be limited to the output stage interweaved into the preceding amplifier output, as presented in [6]. Power buffers and drivers based on various architectures are found in medium-and high-voltage smart power Energies 2022, 15, 23 2 of 26 integrated circuits (IC) and in wireless transmission systems such as RFID [7] for which the scrutinized buffer structure was originally devised.…”

Section: Introductionmentioning

confidence: 99%

Influence of Modifications Related to Safe Operating Area Demands on Operation of a Specialized Medium/High-Voltage Unity-Gain Buffer

Jankowski

2021

Energies

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This paper presents safety-related modifications to the improved high-voltage unity-gain buffer and their impact on the operation quality of this circuit. The analyzed buffer architecture combines the virtues of source and gate followers. It provides high input impedance to the gate follower and voltage gain precision to the source follower while retaining a very simple structure and an extremely short signal path. These properties enable its various applications, e.g., as an interconnection of voltage and current mode function blocks in signal paths of medium- and high-voltage integrated circuits. The scrutinized buffer consists of MOS devices with different maximum interterminal voltages, which results in the necessity of enhancing its architecture with a set of safety devices to ensure non-destructive power-up, normal operation, and power-down phases of the buffer operation. The consequences of the implemented safety changes vs. the influence of the physical implementation process on the buffer operation capabilities are presented in comparison to its ancestral source and gate followers. The results show that the analyzed buffer retains the best signal processing quality among the compared buffer structures after the complete physical implementation process.

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A High-Voltage and Low-Noise Power Amplifier for Driving Piezoelectric Stack Actuators

Cited by 13 publications

References 28 publications

Ethanol gas concentration detection system based on near infrared spectroscopy

Ethanol gas concentration detection system based on near infrared spectroscopy

Simulation of a high frequency on/off valve actuated by a piezo-ring stack for digital hydraulics

Influence of Modifications Related to Safe Operating Area Demands on Operation of a Specialized Medium/High-Voltage Unity-Gain Buffer

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