新的道源追随器具有低1 / f噪声和高电压增益
Ki Yeong Kim1, Hyangwoo Kim2, Minkeun Choi1
1Department of Convergence IT Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 37673, South Korea.
Scientific reports
|October 9, 2024
概括
我们为图像传感器开发了一个道源追随器 (TSF),实现了高电压增益和显著降低1 / f噪声. 这种新的设计利用带对带道 (BTBT) 在先进的成像应用中提供卓越的性能.
科学领域:
- 固态设备物理 固态设备物理
- 微电子学微电子学
- 图像传感器技术 图像传感器技术
背景情况:
- 图像传感器中的常规源追随器 (SF) 面临电压增益 (Av) 的限制,并表现出显著的1/f噪声.
- 现有的设计通常依赖于热电离辐射,这可能导致增加通道长度调制和体效应,影响性能.
- 需要改进的SF架构,同时增强电压增益和减少噪声,以获得更好的图像质量.
研究的目的:
- 为图像传感器设计和描述一种新的道源追随器 (TSF).
- 为了同时实现高电压增益 (Av) 和低1/f噪声性能.
- 为了利用带对带道 (BTBT) 来增强设备特性.
主要方法:
- 设计了一个TSF结构,使用N-P-N-N配置与p-doped接地区域来促进带对带道 (BTBT).
- 采用基于道的机制,与传统的热电辐射形成鲜明对比,通过最小化通道长度调制和体效应来改善Av.
- 使用n-doped通道来增加导电通道与接口的距离,从而减少噪声.
主要成果:
- 与传统的SF (~0.9V/V) 相比,TSF实现了大约1.0V/V的更高电压增益 (Av).
- 输入参考电压噪声光谱密度 (SV) 的TSF大约是10倍低于传统的SFs.
- 通过将导电通道远离接口,TSF设计有效地抑制噪声.
结论:
- 开发的道源追随器 (TSF) 在电压增益和低1 / f噪声方面都表现出卓越的性能.
- 使用带对带道 (BTBT) 的TSF架构,比传统的源追随器提供了显著的改进.
- TSF是下一代图像传感器的有希望的候选者,需要高电压增益和最小的噪声.
相关概念视频
Biasing of FET
219
Biasing a Junction Field Effect Transistor (JFET) is crucial for setting operational parameters and ensuring efficient functioning in electronic circuits. JFETs are characterized by using a single carrier type in N-channel or P-channel configurations, where the channel is surrounded by PN junctions. These junctions are central to the device's ability to control current flow.
In an N-channel JFET, the structure consists of N-type material forming the channel on a P-type substrate, with the...
In an N-channel JFET, the structure consists of N-type material forming the channel on a P-type substrate, with the...
219
Small-Signal Analysis of MOSFET Amplifiers
514
In small-signal analysis, a MOSFET transistor amplifier acts as a linear amplifier when operating in its saturation region. The gate-to-source voltage (VGS) of the MOSFET is the sum of the DC biasing voltage and the small time-varying input signal. This combination sets up the operating point and modulates the drain current (ID) that flows from the drain to the source. When a small AC signal is superimposed on the DC bias voltage at the gate, the instantaneous drain current comprises three...
514
MOSFET Amplifiers
147
The MOSFET, when operating in its active region, functions as a voltage-controlled current source. In this region, the gate-to-source voltage controls the drain current. This principle underlies the operation of the transconductance MOSFET amplifier. The output current is directed through a load resistor to convert this amplifier into a voltage amplifier. The output voltage is then obtained by subtracting the voltage drop across the load resistance from the supply voltage. This process results...
147
MOSFET: Enhancement Mode
298
Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no...
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no...
298
Configurations of BJT
381
Bipolar Junction Transistors (BJTs) are categorized into various types based on their configurations, each with distinct characteristics and applications. The configurations are primarily differentiated by which terminal—base, emitter, or collector—is common to both the input and output circuits.
The common base configuration is noted for its high voltage gain, positioning it as an ideal choice for single-stage amplifier circuits, such as microphone pre-amplifiers. A notable...
The common base configuration is noted for its high voltage gain, positioning it as an ideal choice for single-stage amplifier circuits, such as microphone pre-amplifiers. A notable...
381
Cut-off Frequency of BJT
650
Cut-off frequencies in Bipolar Junction Transistors (BJTs) mark the transition between the signal's pass band and stop band, influencing their performance in amplifying or attenuating frequencies. These frequencies are crucial for designing BJTs to meet specific operational requirements in electronic circuits.
Alpha Cut-Off Frequency: Pertinent to the common-base configuration, the alpha cut-off frequency defines the upper-frequency limit at which the current gain, alpha, remains stable. As...
Alpha Cut-Off Frequency: Pertinent to the common-base configuration, the alpha cut-off frequency defines the upper-frequency limit at which the current gain, alpha, remains stable. As...
650


