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Updated: Jun 14, 2025

Nanofabrication of Gate-defined GaAs/AlGaAs Lateral Quantum Dots
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Nanofabrication of Gate-defined GaAs/AlGaAs Lateral Quantum Dots

Published on: November 1, 2013

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高效设计和实施近似的FA,FS和FA/S电路用于QCA中的纳米计算

Saeid Seyedi1, Hatam Abdoli1

  • 1Department of Computer Engineering, Faculty of Engineering, Bu-Ali Sina University, Hamedan, Iran.

PloS one
|September 6, 2024
PubMed
概括

这项研究引入了用于近似算术的新型量子细胞自动机 (QCA) 电路,包括完整的加法器和波纹携带加法器. 这些基于XOR的设计为QCA计算提供了显著的速度和空间效率改进.

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Design Example: Capacitance Multiplier Circuit01:20

Design Example: Capacitance Multiplier Circuit

In integrated circuit technology, a capacitance multiplier is often utilized to produce a larger capacitance value when a small physical capacitance falls short. This is achieved by a circuit that multiplies capacitance values by a factor of up to 1000, such that a 10-pF capacitor can replicate the performance of a 100-nF capacitor.
The circuit illustrated in Figure 1 below incorporates two op-amps, with the first operating as a voltage follower and the second acting as an inverting amplifier.
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Aliasing01:18

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Accurate signal sampling and reconstruction are crucial in various signal-processing applications. A time-domain signal's spectrum can be revealed using its Fourier transform. When this signal is sampled at a specific frequency, it results in multiple scaled replicas of the original spectrum in the frequency domain. The spacing of these replicas is determined by the sampling frequency.
If the sampling frequency is below the Nyquist rate, these replicas overlap, preventing the original...
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Design Example: Underdamped Parallel RLC Circuit01:17

Design Example: Underdamped Parallel RLC Circuit

Consider designing an oscillator circuit, a crucial component in various electronic devices and systems. The objective is to create an oscillator circuit with specific characteristics: a damped natural frequency of 4 kHz and a damping factor of 4 radians per second. To accomplish this, a parallel RLC circuit is employed, known for its ability to sustain oscillations at a resonant frequency. In this case, the damping factor is pivotal in achieving the desired performance.
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