Won-Gyu Kim;Sang-Yun Nam;Young-Jun Jeon;Sung-Wan Hong
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引用次数: 0
摘要
本简介提出了一种低差稳压器(LDO)和带隙参考(BGR)系统,设计用于相机应用,其中高电源抑制比(PSRR)和低输出噪声是至关重要的。为了实现从空载到600毫安的宽负载范围内的稳定输出,引入了负载自适应电流镜(LACM)缓冲器。LACM缓冲器有效调节不同负载条件下的电流,最大限度地减少功率损失,同时确保稳定运行。此外,实现了基于采样保持(S/H)的BGR,消除了从电源电压$(V_{\mathrm {SYS}})$到参考电压$(V_{\mathrm {REF}})$的噪声传播,进一步提高了PSRR。该系统采用0.18- $\mu $ m CMOS工艺制备。
A 1.8–5.5-V LDO–BGR System With LACM Buffer for High PSRR in Camera Applications
This brief proposes a low-dropout regulator (LDO) and bandgap reference (BGR) system designed for camera applications, where high power supply rejection ratio (PSRR) and low output noise are critical. To achieve a stable output across a wide load range from no load to 600 mA a load-adaptive current-mirror (LACM) buffer is introduced. The LACM buffer effectively regulates current flow across different load conditions, minimizing power loss while ensuring stable operation. Additionally, a sample-and-hold (S/H)-based BGR is implemented to eliminate noise propagation from the supply voltage $(V_{\mathrm { SYS}})$ to the reference voltage $(V_{\mathrm { REF}})$ , further enhancing PSRR. The proposed system was fabricated using a 0.18-$\mu $ m CMOS process.
期刊介绍:
TCAS II publishes brief papers in the field specified by the theory, analysis, design, and practical implementations of circuits, and the application of circuit techniques to systems and to signal processing. Included is the whole spectrum from basic scientific theory to industrial applications. The field of interest covered includes:
Circuits: Analog, Digital and Mixed Signal Circuits and Systems
Nonlinear Circuits and Systems, Integrated Sensors, MEMS and Systems on Chip, Nanoscale Circuits and Systems, Optoelectronic
Circuits and Systems, Power Electronics and Systems
Software for Analog-and-Logic Circuits and Systems
Control aspects of Circuits and Systems.