Distributed Mixer Bias Layout for Broadband Low-Power Gain
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Distributed mixers face challenges in maintaining broadband nature and high conversion gain while minimizing electric power consumption, particularly due to the difficulty in designing bias circuits that require high resistance, leading to inefficient power usage and potential drain bias voltage issues.
Innovation Solution
A distributed mixer design that eliminates the need for a drain bias circuit by applying bias voltage to ensure equal direct current voltage between the gate and source of transistors, with the direct current voltage between the drain and source being equal to the threshold voltage, thereby reducing electric power consumption and maintaining broadband characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If high resistance bias circuits are used to maintain broadband nature, then broadband characteristics are preserved, but electric power consumption increases and drain bias voltage becomes problematic
Solution Approach 1:
The invention extracts and eliminates the drain bias circuit from the distributed mixer structure. By removing the high resistance bias circuit that caused power consumption issues, the patent achieves broadband operation without the associated energy waste and voltage drop problems
Solution Approach 2:
The distributed mixer is designed to operate without external drain bias voltage application. The mixer leverages the intrinsic properties of the transmission lines and transistors to achieve broadband mixing functionality, making the system self-sufficient and eliminating the need for power-consuming bias circuits
2Adaptability or versatility
If high resistance bias circuits are used to maintain broadband nature, then broadband characteristics are preserved, but the circuit complexity and design difficulty increase
Solution Approach 1:
The invention removes the complex high resistance bias circuit from the distributed mixer architecture. By extracting this unnecessary component, the patent simplifies the overall circuit design while maintaining broadband operation through the inherent properties of the transmission line structure
Solution Approach 2:
The transmission lines in the distributed mixer serve multiple functions: they provide the mixing function, maintain broadband characteristics, and eliminate the need for separate bias circuits. This multi-functionality reduces overall circuit complexity while achieving the desired broadband performance
Data Source
AI summary
A distributed mixer is configured of an artificial transmission line of which an input end is connected to an LO terminal and a terminal end is connected to an IF terminal, an artificial transmission line of which an input end is connected to an RF terminal, FETs that perform frequency synthesis of LO signals and RF signals and that are disposed following the artificial transmission lines and of which gates are connected to the artificial transmission line and sources are grounded, a bias circuit that applies gate bias voltage to a terminal end of the artificial transmission line, a terminating resistor that connects the terminal end of the artificial transmission line and a ground, and a plurality of transmission lines provided between the artificial transmission line and a drain of each FET.