A 2-V 900-MHz CMOS mixer for GSM receivers

A 2-V 900-MHz downconversion mixer to be used in a single-chip CMOS receiver is presented. The mixer is based on a Gilbert cell but uses two source-followers as current modulators rather than a common-source input stage in order to support low-voltage operation and to improve the linearity. Two prot...

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Bibliographic Details
Main Authors: Toby Kwok-Kei Kan, Kin-Chung Mak, Dongsheng Ma, Luong, H.C.
Format: Conference Proceeding
Language:English
Subjects:
CMOS technology
Frequency conversion
GSM
Linearity
Mixers
Power measurement
Prototypes
Radio frequency
RF signals
Voltage
Online Access:Request full text
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Description
Summary:A 2-V 900-MHz downconversion mixer to be used in a single-chip CMOS receiver is presented. The mixer is based on a Gilbert cell but uses two source-followers as current modulators rather than a common-source input stage in order to support low-voltage operation and to improve the linearity. Two prototypes have been made for different design trade-off. The first mixer prototype achieves a measured conversion gain of -8 dB and an IIP3 of 26 dBm with a power consumption of 1.5 mW from a 3-V supply. The second prototype has a measured conversion gain of -2 dB, a noise figure (NF) of 22 dB and an IIP3 of 6 dBm with a power consumption of 3 mW from a single 2-V supply.
DOI:10.1109/ISCAS.2000.857096