3~5GHz 利用回授與current reuse/current bleeding技術之 微型化接收機

Abstract

To fit the needs of the UWB systems,- low system complexity, low cost, and low power consumption, this study examines methods of reducing the chip area to reduce -costs and develop a receiver front-end circuit design for UWB systems. The design comprises three manufactured circuits. With the 3~ 5GHz low noise amplifier with a single inductor matching network, the gain is 15.7 ± 0.25dB, the noise figure is less than 3dB, and the chip size is 0.6mm ². Using this LNA to design a 3 ~ 5GHz receiver, the gain is 18 ± 1dB, the noise figure is less than 3.5dB, and the chip size is 0.93mm ². Finally, for the design of a 3 ~ 8GHz single inductor mixer device, the gain is15.2 ± 0.5dB, the noise figure is less than 10.5dB, and the chip size is 0.5mm ². The goal of all circuits is to reduce the number of inductors required. All designs use the TSMC 0.18 um CMOS process and all measurement results satisfied the expectations. Additionally, this paper introduces a design of a 3.5GHz transformer based low voltage supply receiver for the WiMAX system. To reduce the power consumption of the system, this study proposes the use of a low voltage structure; the overall circuit can be driven at 0.6V. Using a 0.6V/10.6 mW power supply, a gain of 23.5 dB was be achieved, with a noise figure of 3.87 dB.