Open AccessFeedback followed bias generation scheme for complementary passive mixer
Author(s) -
Liao Youchun,
Mei Niansong,
Zhang Zhaofeng
Publication year - 2018
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2017.4803
Subject(s) - dc bias , biasing , offset (computer science) , cmos , voltage , control theory (sociology) , common mode signal , signal (programming language) , electronic engineering , computer science , electrical engineering , engineering , artificial intelligence , analog signal , programming language , control (management) , digital signal processing
A complementary passive mixer with feedback followed gate bias generation scheme is proposed. The gate voltage of the switches follows the common‐mode voltage ( V CM ) of the signal paths, so that the proposed mixer achieves constant switching gate‐to‐source bias voltage and coherent performances while V CM changes over a certain range. Furthermore, a dc offset cancelation method based on the bias generation circuit is proposed. The dc component of the intermediate frequency is feedbacked to the bias generation input to form a cancelation path. A behavioural model is deduced to prove the effect of the offset cancelation and second intercept point (IIP2) improvement. The proposed mixer is implemented in a 0.13 μm CMOS process, and measurement results show that robust performance with the V CM range of 0.5–0.7 V and 16 dB IIP2 improvement are obtained.