相关实验视频
Updated: May 12, 2026

09:10
Fabrication and Testing of Microfluidic Optomechanical Oscillators
Published on: May 29, 2014
12.1K
关于微瓦特全数字频率合成器的评论
Venkadasamy Navaneethan1,2, Boon Chiat Terence Teo1,3, Annamalai Arasu Muthukumaraswamy2
1School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798, Singapore.
Micromachines
|March 27, 2025
概括
本综述探讨了用于物联网 (IoT) 设备的低功耗,高度集成的全数字频率合成器. 它强调了CMOS技术和架构的进步,例如全数字相锁循环 (ADPLLs) 以实现高效的电力消耗.
科学领域:
- 电气工程 电气工程
- 集成电路 集成电路
- 信号处理 信号处理
背景情况:
- 物联网 (IoT) 设备的扩散需要高度集成和低功耗的电子元件.
- 传统的频率合成器在物联网应用中经常面临功耗和集成密度的限制.
- 互补金属氧化物半导体 (CMOS) 技术为高密度信号处理提供了一个强大的平台,非常适合先进的合成器设计.
研究的目的:
- 审查高度集成的全数字频率合成器的最新进展.
- 识别和分析适合低功耗物联网 (IoT) 应用的架构.
- 建立低功耗作为评估基于CMOS的全数字频率合成器的主要指标.
主要方法:
- 关于全数字频率合成器近期发展的文献综述.
- 专注于在CMOS制造技术中实现的架构.
- 合成器的分类为没有分隔器的低功耗类型:全数字相锁环 (ADPLL),全数字频锁环 (ADFLL) 和混合PLL.
- 对ADPLL的架构创新进行分析,包括数字到时间转换器 (DTC) 辅助的时间到数字转换器 (TDC) 和嵌入式TDC.
主要成果:
- 在全数字相锁循环 (ADPLL) 中,CMOS技术能够实现高密度,强大的信号处理,这对全数字相锁循环 (ADPLL) 至关重要.
- 没有分离器的低功率频率合成器,包括ADPLL,ADFLL和混合PLL,是物联网的关键.
- 像DTC辅助的TDC和嵌入式TDC这样的架构改进有助于降低ADPLL的功耗.
结论:
- 在CMOS中高度集成的全数字频率合成器对于低功耗物联网应用是必不可少的.
- 该审查确定了ADPLL,ADFLL和混合PLL作为有前途的架构.
- 持续的架构发展对于实现未来物联网设备严格的低功耗要求至关重要.
相关概念视频
Effective Value of a Periodic Waveform
The concept of effective value, the root mean square (RMS) value, is crucial in understanding electrical circuits and power delivery. This idea emerges from the necessity to measure the effectiveness of a voltage or current source in supplying power to a resistive load.
The effective value of a periodic current represents the direct current (DC) that conveys the same average power to a resistor as the periodic current itself. This concept is crucial when assessing AC circuits. To determine the...
The effective value of a periodic current represents the direct current (DC) that conveys the same average power to a resistor as the periodic current itself. This concept is crucial when assessing AC circuits. To determine the...
Clipper Circuit
A clipper circuit is a fundamental wave-shaping device that harnesses the unique properties of diodes to alter and control waveform characteristics. This technology is widely used in electronic devices, especially in television and radar communication systems, where it enhances waveform modulation in both transmitters and receivers.
The operation of a clipper circuit can be exemplified by analyzing a dual-clipper configuration setup that integrates two ideal diodes, each paired with a biasing...
The operation of a clipper circuit can be exemplified by analyzing a dual-clipper configuration setup that integrates two ideal diodes, each paired with a biasing...
Discrete-Time Fourier Series
The Discrete-Time Fourier Series (DTFS) is a fundamental concept in signal processing, serving as the discrete-time counterpart to the continuous-time Fourier series. It allows for the representation and analysis of discrete-time periodic signals in terms of their frequency components. Unlike its continuous counterpart, which utilizes integrals, the calculation of DTFS expansion coefficients involves summations due to the discrete nature of the signal.
For a discrete-time periodic signal x[n]...
For a discrete-time periodic signal x[n]...
Aliasing
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 signal...
If the sampling frequency is below the Nyquist rate, these replicas overlap, preventing the original signal...
Downsampling
When considering a sampled sequence with zero values between sampling instants, one can replace it by taking every N-th value of the sequence. At these integer multiples of N, the original and sampled sequences coincide. This process, known as decimation, involves extracting every N-th sample from a sequence, thereby creating a more efficient sequence.
The Fourier transform of the decimated sequence reveals a combination of scaled and shifted versions of the original spectrum. This...
The Fourier transform of the decimated sequence reveals a combination of scaled and shifted versions of the original spectrum. This...
Upsampling
Managing signal sampling rates is essential in digital signal processing to maintain signal integrity. A decimated signal, characterized by a reduced frequency range due to its lower sampling rate, can be upsampled by inserting zeros between each sample. This upsampling process expands the original spectrum and introduces repeated spectral replicas at intervals dictated by the new Nyquist frequency. To refine this zero-inserted sequence, it is passed through a lowpass filter with a cutoff...

