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Class-AB Audio Power Amplifiers - STMicroelectronics
https://www.st.com/en/audio-ics/class-ab-audio-power-amplifiers.html
(PDF) A Novel Class AB CMOS Operational Amplifier
https://www.researchgate.net/publication/323296662_A_Novel_Class_AB_CMOS_Operational_Amplifier
A class AB two stage CMOS operat ional amplifier with accurately controlled quiescent current is propos ed with detailed analysis of slew ra te and stability.
A Low Voltage, Rail-to-Rail, Class AB CMOS Amplifier With ...
http://rincon-mora.gatech.edu/publicat/jrnls/tcasii01_ab_amp.pdf
Abstract--This paper describes a CMOS rail-to-rail class AB operational amplifier designed to have extremely low output impedance and large current-drive capability. The amplifier uses an innovative output stage, having both source follower and common source stages working simultaneously throughout the output common-mode range. The source
Design and compensation of high performance class AB ...
http://jultika.oulu.fi/files/isbn9789514261770.pdf
The class AB amplifier cores presented here improve the amplifier’s power supply noise insensitivity at high frequencies and increase bandwidth efficiency when compared to the commonly used two-stage Miller compensated amplifier, enabling the construction of better buffers and more power-efficient and reliable low voltage mixed signal chips.
Class AB Output Stage - University of Pennsylvania
https://www.seas.upenn.edu/~ese319/Lecture_Notes/Lec_22_ClassAB_Amplifier_12.pdf
Basic Class AB Amplifier Circuit 1. Bias Q N and Q P into slight conduction (fwd. act.) when v I = 0: i N = i P. 2 Ideally Q N and Q P are: a. Matched (unlikely with discrete transistors and challenging in IC). b. Operate at same ambient temperature. NOTE. This is base-voltage biasing with all its stability problems! i L=i N −i P 3.For v i > 0: i N > i P i.e. Q N
Class AB Output Stage - University of Pennsylvania
https://www.seas.upenn.edu/~ese319/Lecture_Notes/Lec_22_ClassAB_Amplifier_08.pdf
Class AB Amplifier Biasing A straightforward biasing approach: D1 and D2 are diode-connected transistors identical to QN and QP, respectively. They form mirrors with the quiescent current set by R: I Q= 2V CC−1.4 2R = V CC−0.7 R or: R= V CC−0.7 I Q Recall: With mirrors, the device temperature for all transistors needs to be matched! QN QP +-V BB I Q I Q I I Q
Class AB Power Amplifiers - Learn About Electronics
https://www.learnabout-electronics.org/Amplifiers/amplifiers55.php
Class AB Power Amplifiers The class AB push-pull output circuit is slightly less efficient than class B because it uses a small quiescent current flowing, to bias the transistors just above cut off as shown in Fig. 5.5.1, but the crossover distortion created by the non-linear section of the transistor’s input characteristic curve, near to cut off in class B is overcome.
P-channel Power MOSFETs Approach N-Channel …
https://www.ixys.com/Documents/Articles/Article_P_Channel_Power_MOSFETs.pdf
Audio amplifier is perhaps the most important application of P-channel MOSFETs. Fig. 7 shows a class AB audio amplifier circuit, which has a complementary Power MOSFET output stage, a differential input stage and a biasing circuit for the output stage. It offers performance improvements over the
Design, Analysis, and Testing of Low-Voltage CMOS OTA ...
https://link.springer.com/chapter/10.1007%2F978-981-10-8234-4_4
Abstract. Design, simulation, and testing of a two-stage CMOS operational transconductance amplifier by 0.18 µm complementary metal oxide semiconductor (CMOS) technology are described in this paper. The operational transconductance amplifier has ±1 V power supply and 113 µA input bias current. The basic parameters of the operational …
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