How can the linearity of a down conversion mixer be improved?
The linearity of a down-conversion mixer can be improved through various methods. One approach is to introduce a transformer between the transconductance stage and the switching quad stage, which creates a radio-frequency (RF) common-source (CS) pre-amplifier and a current-mode passive mixer . Another method involves inductively coupling the transconductance (GM) stage and the switch (SW) stage with a transformer, which provides high drain-to-source voltage to the SW stage and results in high-linearity . Additionally, a new linearization method called the "reverse uplift" phenomenon can be utilized, which greatly improves the input 1 dB compression point (IP1dB) and output 1 dB compression point (OP1dB) . Furthermore, employing a fully differential Darlington cell in the RF transconductance stage can effectively suppress third-order nonlinearity and enhance linearity . These techniques contribute to achieving high-linearity performance in down-conversion mixers, making them suitable for applications in wireless communications.
Answers from top 5 papers
| Papers (5) | Insight |
|---|---|
10 Citations | The linearity of a down-conversion mixer can be improved by using a fully differential Darlington cell in the RF transconductance stage to suppress third-order nonlinearity. |
28 Oct 2022 | The linearity of a down-conversion mixer can be improved by introducing a transformer between the transconductance stage and the switching quad stage. |
| The linearity of a down-conversion mixer can be improved by using a transformer to provide high drain-to-source voltage to the switch stage. | |
01 Jan 2020 | The linearity of a down-conversion mixer can be improved by using a new fully differential Darlington cell with a cross-connected topology. |
| The linearity of a down-conversion mixer can be improved by exploiting the "reverse uplift" phenomenon, as proposed in this paper. |