A Low Power Driver Amplifier for Unlicensed 2.4 GHz Band

Abstract

This paper presents the design of a driver amplifier (DA) for a cordless mouse application, operating at the 2.4 GHz ISM unlicensed band. The DA is a single-ended topology, and is composed of two stages: the first stage is a cascode amplifier to provide high gain and good input-output isolation, while the output stage is a simple common source amplifier that adopts a novel current reuse scheme to reduce the DC bias current by half. The DA implemented in a 0.18m CMOS process has a 16 dB gain at 2.4 GHz, and it can drive a 3 dBm to the antenna with an output stage drain efficiency of 31 % and a power-added efficiency (PAE) of 20 % while drawing 4.5 mA from a 1.8 V supply.

Optimal Design of Low Power CMOS Power Amplifier Using Particle Swarm Optimization Technique

“…Particle with best fitness value of all the particles can be selected as the gbest value. For each particle, particle's position and velocity can be updated according to (8) and (9).This procedure is repeated until the maximum iterations reached. (9) where d = 1, 2, .…”

“…These stages were biased in class A mode. It achieved 16 dB gain, 31 % drain efficiency, 20 % PAE and 8.1 mW dc power consumption for obtaining 3 dBm transmit power [9]. A 1 V, 69-73 GHz CMOS two stage cascade sub power amplifier based on improved Wilkinson power combiner was presented.…”