Level Shift Circuit With Current Regulation for Low-Voltage Conversion
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Solution Overview
Problem
There is a need for a technology that can efficiently convert signal levels with low voltage while reducing power consumption, particularly in small devices like mobile and IoT devices where traditional level shift circuits are inefficient.
Innovation Solution
A level shift circuit comprising an input section, a supply section, and a regulator, where the supply section connects a pair of power supply lines with higher voltage to nodes, and the regulator controls current flow between these nodes based on the input signal, allowing for efficient signal level conversion even with low input voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a traditional level shift circuit is used to convert signal levels between different power supply systems, then the signal level conversion function is achieved, but power consumption increases
Solution Approach 1:
The level shift circuit is divided into multiple functional sections: a first conversion section that converts the input signal to an intermediate level, and a second conversion section that converts the intermediate signal to the final output level. This segmentation allows each section to operate more efficiently, reducing overall power consumption while maintaining reliable signal level conversion capability.
Solution Approach 2:
An intermediate signal level is introduced as a mediator between the input signal level and the output signal level. The first conversion section uses this intermediate level as a stepping stone, allowing for more efficient voltage translation than direct conversion. This intermediary approach reduces the power consumption burden on any single conversion stage.
2Use of energy by moving object
If a low voltage system is used to reduce power consumption, then power consumption decreases, but the ability to interface with higher voltage circuits is limited
Solution Approach 1:
The circuit dynamically adapts to different voltage levels by using a two-stage conversion process. The first conversion section handles the transition from the low voltage input signal to an intermediate level, while the second conversion section handles the transition to the higher voltage output level. This dynamic adaptation allows the circuit to interface between different voltage domains efficiently.
Solution Approach 2:
The circuit changes the voltage parameter in two distinct steps rather than attempting a single large-step conversion. The first conversion section changes the voltage from the input level to an intermediate level, and the second conversion section changes it from the intermediate level to the output level. This parameter change approach maintains adaptability across different voltage systems while operating efficiently at low voltages.
Data Source
AI summary
A level shift circuit includes an input section to which input signal of a first power supply system is input, a supply section that includes a pair of nodes, and a regulator. The supply section is connected to one of a pair of power supply lines serving as a second power supply system of which a voltage level is higher than a voltage level of the first power supply system, the supply section supplying a potential of the one of the pair of power supply lines to one of the pair of nodes according to the input signal. The regulator is connected to another of the pair of power supply lines, the regulator regulating current flowing between the one of the pair of nodes that is supplied with the potential of the one of the pair of power supply lines, and the other of the pair of power supply lines.