Title: 5.8 GHz 4.7 mA Zero-IF Passive Mixer Receiver Using a Step-Down Transformer for Gain Enhancement
Authors: Chang, Wei-Ling
Meng, Chinchun
Lin, Chung-Yo
Huang, Guo-Wei
Department of Electronics Engineering and Institute of Electronics
Issue Date: 2015
Abstract: This paper demonstrates a 5.8 GHz low-power, low flicker -noise I/Q zero-IF receiver in 0.18-um CMOS process. Passive resistive mixers and deep-n-well vertical-NPN (V-NPN) bipolar junction transistors (BJTs) as the transconductance stage of the IF amplifier are employed to improve the flicker noise problem. The passive mixer is in current mode operation and thus a step-down transformer is used at the LNA output to enhance the current gain. By carefully designing the 4:2 stepdown transformer, the conversion gain of the whole zero-IF receiver performs up to 51 dB when LO power is 6 dBm, and the 3-dB bandwidth covers 5.7-6.1 GHz with the current consumption of 4.7 mA at 1.8 V supply. The flicker noise corner is 100 kHz and the noise floor is 6.5 dB. The I/Q amplitude mismatch and phase difference are below 0.05 dB and 2.5, respectively.
URI: http://hdl.handle.net/11536/135910
ISBN: 978-1-4799-8767-2
Appears in Collections:Conferences Paper