A CMOS operational amplifier with a Class AB output stage has an output terminal and an input stage driving the output stage. The Class AB output stage includes a pair of p-channel and n-channel output transistors series-connected between the VDD and VSS supply terminals of a power supply. ...
功率放大器采用SMIC 0.18 μm RF CMOS工艺设计,电源电压为3.3 V,工作频率为2.45 GHz。放大器采用两级共源共栅(cascode)结构,两级放大器均采用class AB偏置,在获得较好线性度的同时也有较高的效率。设计采用电流镜为两级放大电路提供静态偏置电流,该电流镜由带隙基准电路产生。功率放大器的原理图如图2所示。 1.1 ...
Rail-to-Rail运放的输出级一般采用具有较高转换效率的AB类输出结构。在低压设计中,常采用前馈式AB类输出级和反馈式AB类输出级[4]两种结构。由于前馈式AB类输出级晶体管输出电流易于控制,而且电路结构简单、稳定性好,所以本文采用浮动电流源控制的前馈式AB类输出级电路,结构如图3所示。 图3中,M36、M37为输出晶体管...
The class AB output stage provides a faster settling time and reduced power dissipation. Simulations of the proposed circuits were carried out in cadence specter on 180-nm process technology at a supply voltage of 1.6 V. The proposed split-length current mirror load OPAMP exhibits power ...
The class AB output stage is capable of driving 100-kΩ loads connected to any point between V+ and ground. The input common-mode voltage range includes both rails, allowing the OPA373 and OPA374 series op amps to be used in virtually any single-supply application up to a supply voltage...
7.3.3 Rail-to-Rail Output The device uses a class-AB output stage with common-source transistors to achieve rail-to-rail output. For high- impedance loads (> 200 Ω), the output voltage swing is typically 100 mV from the supply rails. With 10-Ω loads, a user can achieve a ...
Lecture 7 Output stage Micro-electronics Department EIS Soochow University index1.general consideration of output stage 1.requirements of output stage 2. output stage design issues 3.non-linearity and harmonic distortion2.general types of output stage 1. Class A MOS source follower 2. Class-A MOS...
Design of Two-Stage Class AB CMOS Buffers: A Systematic Approach Antonio Lopez Martin, Jose Maria Algueta Algueta, Lucia Acosta, Jaime Ramirez-Angulo, and Ramon Gonzalez Carvajalvol June. 2011, pp. 393-400. IEEE Journal of Solid-State Circuits ( Volume: 29, Issue: 9, Sep 1994 )...
The proposed FDCCII is based on a fully-differential difference transconductor as an input stage and two class AB output stages. Besides the proposed FDCCII circuit operating at a supply voltage of ± 1.5 V, it has a total standby current of 380 μA. The applications of the FDCCII to ...
上海芯炽科技推出新品SC7517/SC7510/SC7518为单通道/双通道/四通道、258MHz、轨至轨 I/O、CMOS运算放大器;该运算放大器是专为视频应用和其它需要宽带宽的应用而设计;单位增益