Bias Voltage Selection Circuit for Flexible Transistor Driving
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional driving circuits require independent bias voltage sources that occupy additional circuit space and provide fixed bias voltages, which cannot meet varying requirements.
Innovation Solution
A control circuit with a voltage adjusting circuit and candidate voltage selecting circuit that generates and selects bias voltages from operating and predetermined voltages, allowing for multiple bias voltage options, including core voltage, predetermined voltage minus core voltage, or ground voltage, to be applied to transistors in the driving circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If independent bias voltage sources are used to provide fixed bias voltages, then the transistors can operate in a suitable state, but the circuit occupies more circuit regions and cannot meet different requirements
Solution Approach 1:
The patent merges the bias voltage source with the existing voltage adjusting circuit. The voltage adjusting circuit generates multiple bias voltages (first bias voltage and second bias voltage) from the operating voltage, eliminating the need for separate independent bias voltage sources. This integration reduces circuit area while maintaining reliable transistor operation.
Solution Approach 2:
The voltage adjusting circuit is designed to provide multiple bias voltages for different transistors and different operating conditions. It can generate at least two different bias voltages from a single operating voltage source, making the circuit adaptable to various transistor requirements without needing separate dedicated voltage sources for each.
2Device complexity
If fixed bias voltage values are used, then the circuit design is simplified, but the circuit cannot meet different requirements of various applications
Solution Approach 1:
The patent implements dynamic bias voltage selection by providing multiple bias voltage outputs from the voltage adjusting circuit. The circuit can dynamically select and provide different bias voltages (first bias voltage or second bias voltage) based on the specific application requirements, making the circuit adaptable while maintaining manageable complexity through a unified voltage adjustment mechanism.
Solution Approach 2:
The voltage adjusting circuit changes the bias voltage parameter by generating at least two different bias voltages from the operating voltage. This allows the circuit to adapt to different application requirements by varying the bias voltage parameter without fundamentally changing the circuit structure, thus maintaining design simplicity while enhancing versatility.
3Adaptability or versatility
If multiple independent bias voltage sources are provided, then different bias voltage requirements can be met, but the circuit complexity and area increase
Solution Approach 1:
The patent combines multiple bias voltage generation functions into a single voltage adjusting circuit. Instead of using multiple independent bias voltage sources, the circuit integrates the ability to generate at least two different bias voltages from one operating voltage source, thereby reducing circuit complexity while maintaining adaptability to different bias voltage requirements.
Data Source
AI summary
A control circuit comprising a driving circuit, which comprises a voltage adjusting circuit for generating a control voltage, and comprises a first transistor and a second transistor. The first transistor comprises: a first terminal; a second terminal; and a control terminal, for receiving a bias voltage generated from at least operating voltage of the control circuit. The second transistor comprises: a first terminal, coupled to a second terminal of the first transistor; a second terminal, for receiving a first predetermined voltage; and a control terminal, for receiving the control voltage. The control circuit further comprises: a candidate voltage selecting circuit, for outputting one of a plurality of candidate voltages; and a voltage selecting circuit, for outputting one of the candidate voltage output from the candidate voltage selecting circuit and a ground voltage as the bias voltage.