Charge Conservation Technique to Reduce Dynamic Power of Class AB Amplifier for LCD using LTSpice

An Adaptive Biasing Technique to Convert a Pseudo-Class AB Amplifier to Class AB

An essential modification to a conventional four-stage pseudo-class AB amplifier results in a true class AB amplifier. As opposed to the conventional pseudoclass AB scheme, which uses a current mirror in the third stage, our work uses an adaptive biasing circuit in the third stage in order to drastically reduce quiescent current. The pseudo-class AB and new class AB amplifiers are designed in a...

Class-ab Rail-to-rail Cmos Buffer Amplifier for Tft-lcd Source Drivers

A class-AB rail-to-rail CMOS buffer amplifier is proposed and fabricated. The main circuit structure includes a bias circuit, a complementary folded-cascode differential input stage, a common-mode rejection ratio (CMRR) enhancement stage, and a class-AB output stage. With the complementary folded-cascode input stage, high input common-mode range (ICMR) and rail-to-rail output are realized. By u...

2.4GHZ Class AB power Amplifier For Healthcare Application

The objective of this research was to design a 2.4 GHz class AB Power Amplifier (PA), with 0.18um Semiconductor Manufacturing International Corporation (SMIC) CMOS technology by using Cadence software, for health care applications. The ultimate goal for such application is to minimize the trade-offs between performance and cost, and between performance and low power consumption design. This pap...

Design of High Efficiency Broadband Adjusted Class AB Power Amplifier

Dynamic power efficiency improvement for PWM class-D amplifier

This paper presents the technique to dynamically enhance the power efficiency of PWM class-D amplifier over a wide range of modulation indexes. The power stage of amplifier is segmented into several small stages and selectively enabled according to the power demand (i.e. modulation indexes). The capability of power delivery is dynamically adjusted to minimize the power loss in case of different...