Voltage-Locking Bias Compensation for Stable Amplifier Turn-On
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing bias circuits in millimeter wave technology, particularly for 5G communication systems, face challenges in maintaining stable turn on voltage and temperature variability, often requiring additional CMOS or bipolar processes that increase production costs and reduce integration.
Innovation Solution
A bias compensation circuit with a voltage locking circuit and resistors is introduced, where the voltage difference between terminals is kept constant, stabilizing the turn on voltage and reducing current variations due to temperature and fabrication variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If operational amplifiers or current sources are used to perform bias compensation, then control precision is improved, but device complexity and production cost increase due to requiring additional CMOS or bipolar process
Solution Approach 1:
The patent extracts the bias compensation function from complex operational amplifiers or current sources and implements it using a simplified voltage locking circuit with basic components (transistors and resistors). This extraction maintains the essential compensation capability while removing unnecessary complexity and additional process requirements.
Solution Approach 2:
The patent replaces expensive operational amplifiers or current sources with a cost-effective voltage locking circuit using standard transistors and resistors. This substitution achieves the same compensation function at lower cost and with standard fabrication processes, eliminating the need for additional CMOS or bipolar process.
2Measurement precision
If operational amplifiers or current sources are used to perform bias compensation, then control precision is improved, but manufacturing cost increases due to additional CMOS or bipolar process
Solution Approach 1:
The patent replaces expensive operational amplifiers or current sources with a cost-effective voltage locking circuit using standard transistors and resistors. This substitution achieves the same compensation function at lower cost and with standard fabrication processes, eliminating the need for additional CMOS or bipolar process.
3Measurement precision
If additional CMOS or bipolar process is used to implement bias compensation, then control precision is improved, but integration is reduced
Solution Approach 1:
The patent merges the bias compensation function into the existing amplifying transistor circuit using a voltage locking circuit. This integration allows the compensation function to be implemented within the same process and structure as the amplifying transistor, improving integration without requiring separate CMOS or bipolar process.
Data Source
AI summary
A bias compensation circuit, coupled to an amplifying transistor, is disclosed. The bias compensation circuit comprises a voltage locking circuit, comprising a first terminal and a second terminal, wherein the first terminal is coupled to a third terminal the amplifying transistor, and the second terminal is coupled to a control terminal of the amplifying transistor; and a first resistor, coupled to the first terminal of the voltage locking circuit; wherein when the voltage locking circuit is conducted, a voltage difference between the first terminal and the second terminal is substantially constant.