Down-conversion mixer
AssigneeNational Chi Nan University
InventorsYo-Sheng Lin, Kai-Siang Lan
Life of this patent
Estimating the term…
Abstract
A down-conversion mixer includes a converting-and-mixing module and a load module. The converting-and-mixing module performs voltage-to-current conversion and mixing with first and second differential oscillatory voltage signal pairs upon a differential input voltage signal pair to generate first and second differential mixed current signal pairs. The load module includes two RL circuits and a negative resistance providing circuit that cooperate to convert the first and second differential mixed current signal pairs into first and second differential mixed voltage signal pairs. Each RL circuit includes two variable resistors, and an inductor connected between the variable resistors.
Claims11
A down-conversion mixer comprising:
- a converting-and-mixing module for receiving a differential input voltage signal pair, a first differential oscillatory voltage signal pair and a second differential oscillatory voltage signal pair, and performing voltage-to-current conversion and mixing with the first and second differential oscillatory voltage signal pairs upon the differential input voltage signal pair to generate a first differential mixed current signal pair and a second differential mixed current signal pair;
- and
- a load module having a first terminal and a second terminal that are connected to said converting-and-mixing module for cooperatively receiving the first differential mixed current signal pair therefrom, and a third terminal and a fourth terminal that are connected to said converting-and-mixing module for cooperatively receiving the second differential mixed current signal pair therefrom, said load module converting the first differential mixed current signal pair into a first differential mixed voltage signal pair that is provided at said first and second terminals thereof, and converting the second differential mixed current signal pair into a second differential mixed voltage signal pair that is provided at said third and fourth terminals thereof, said load module including
- a negative resistance providing circuit connected to said first to fourth terminals of said load module, and providing two negative resistances, one of which is between said first and second terminals of said load module, and the other one of which is between said third and fourth terminals of said load module, and
- two resistor-inductor (RL) circuits, one of which is connected between said first and second terminals of said load module, and the other one of which is connected between said third and fourth terminals of said load module, each of said RL circuits including two variable resistors and a first inductor that are connected in series between a corresponding one of said first and third terminals of said load module and a corresponding one of said second and fourth terminals of said load module, with said first inductor connected between said variable resistors.
Dependencies are inferred from the claim text.