一个低功率的辅助金属氧化物半导体接收器,带有正方体带宽连续时间的Delta-Sigma模拟到数字转换器,用于物联网应用
1Department of Information and Communication Engineering, School of Electrical and Computer Engineering, Chungbuk National University, Cheongju-si 28644, Republic of Korea.
Sensors (Basel, Switzerland)
|April 28, 2025
概括
这项研究介绍了一种用于物联网设备的低功耗CMOS接收器,采用针对蓝牙低能耗 (BLE) 应用优化的连续时间delta-sigma ADC. 它实现了高性能和高能效,非常适合电池驱动的无线传感器节点.
科学领域:
- 电气工程 电气工程
- 集成电路设计 集成电路设计
- 无线通信无线通信
背景情况:
- 物联网 (IoT) 设备需要节能无线通信解决方案.
- 蓝牙低能耗 (BLE) 是低功耗物联网连接的关键标准.
- 高性能模拟数字转换器 (ADC) 对可靠的无线接收器至关重要.
研究的目的:
- 为2.4 GHz物联网应用提供一种新的低功耗CMOS接收器架构.
- 为BLE标准优化一个复杂的连续时间delta-sigma ADC.
- 为了证明电池驱动物联网设备的优越能源效率和性能指标.
主要方法:
- 设计和实施一个正方形带通连续时间delta-sigma ADC.
- 集成的ADC与2.4 GHz射频前端在28纳米CMOS技术.
- 性能评估包括灵敏度,图像拒绝,动态范围和功耗.
主要成果:
- 实现了10.9位的有效位数 (ENOB),功耗为0.81mW.
- 显示的接收器灵敏度为-95dBm,图像拒绝率为54.2dBc.
- 获得了103.2 fJ/conv的优点数字 (FOM_W),表明了高能效.
结论:
- 开发的低功耗CMOS接收器非常适合电池驱动的物联网传感器节点.
- 优化的delta-sigma ADC架构可以实现高效的BLE通信.
- 该设计为物联网应用程序提供了令人信服的性能,功率效率和小型形式因素平衡.
相关概念视频
01:11Sampling Continuous Time Signal
176
In signal processing, a continuous-time signal can be sampled using an impulse-train sampling technique, followed by the zero-order hold method. Impulse-train sampling involves the use of a periodic impulse train, which consists of a series of delta functions spaced at regular intervals determined by the sampling period. When a continuous-time signal is multiplied by this impulse train, it generates impulses with amplitudes corresponding to the signal's values at the sampling points.
In the...
In the...
176
01:17Bandpass Sampling
141
In signal processing, bandpass sampling is an effective technique for sampling signals that have most of their energy concentrated within a narrow frequency band. This type of signal is known as a bandpass signal. The key principle of bandpass sampling involves sampling the signal at a rate that is greater than twice the signal's bandwidth to prevent aliasing.
A bandpass signal has a spectrum with a lower frequency limit, denoted as ω1, and an upper frequency limit, denoted as ω2....
A bandpass signal has a spectrum with a lower frequency limit, denoted as ω1, and an upper frequency limit, denoted as ω2....
141
01:22Upsampling
159
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...
159
01:10Reconstruction of Signal using Interpolation
145
Signal processing techniques are essential for accurately converting continuous signals to digital formats and vice versa. When a continuous signal is sampled with a period T, the resulting sampled signal exhibits replicas of the original spectrum in the frequency domain, spaced at intervals equal to the sampling frequency. To handle this sampled signal, a zero-order hold method can be applied, which creates a piecewise constant signal by retaining each sample's value until the next...
145
01:22Basic Continuous Time Signals
168
Basic continuous-time signals include the unit step function, unit impulse function, and unit ramp function, collectively referred to as singularity functions. Singularity functions are characterized by discontinuities or discontinuous derivatives.
The unit step function, denoted u(t), is zero for negative time values and one for positive time values, exhibiting a discontinuity at t=0. This function often represents abrupt changes, such as the step voltage introduced when turning a car's...
The unit step function, denoted u(t), is zero for negative time values and one for positive time values, exhibiting a discontinuity at t=0. This function often represents abrupt changes, such as the step voltage introduced when turning a car's...
168
01:19The Y-to-Delta Circuit
378
A balanced wye-to-delta circuit comprises balanced Y-connected voltage sources and delta-connected loads with no neutral line connection.
The initial step in analyzing a wye-to-delta circuit is to assume a positive phase sequence. These phase voltages are then utilized to calculate the line voltages that occur directly across the delta-connected load impedances. Van, Vbn, and Vcn are the phase voltages in wye, and Vab, Vbc, and Vca are the line voltages for a delta circuit. The relation between...
The initial step in analyzing a wye-to-delta circuit is to assume a positive phase sequence. These phase voltages are then utilized to calculate the line voltages that occur directly across the delta-connected load impedances. Van, Vbn, and Vcn are the phase voltages in wye, and Vab, Vbc, and Vca are the line voltages for a delta circuit. The relation between...
378