Level Shift Circuit With Decoding and Non-Overlapping Outputs
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Solution Overview
Problem
Traditional level shift circuits lack a decoding function and exhibit overlapping output signals during transitions between high and low levels, leading to short-circuit current generation and noise interference in analog-to-digital converters.
Innovation Solution
A novel level shift circuit comprising an input module, a control voltage generation module, and output control modules that generate multiple output signals based on node voltages, preventing signal overlap during level transitions and incorporating a decoding function.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional level shift circuits are used to convert low-voltage signals to high-voltage signals, then voltage level conversion is achieved, but signal overlap occurs during transitions causing short-circuit current and noise interference
Solution Approach 1:
The patent introduces a control voltage generation module that produces node voltages in advance to control the timing of output signal transitions. By generating control voltages that precede the actual signal transitions, the circuit ensures that only one output signal changes state at a time, preventing overlap and eliminating short-circuit current during level transitions
Solution Approach 2:
The patent implements a feedback mechanism where the control voltage generation module monitors the input control signal and adjusts the node voltages accordingly. This feedback control ensures that output signals transition in a controlled sequence, preventing simultaneous transitions that would cause signal overlap and harmful current spikes
2Device complexity
If traditional level shift circuits without decoding function are used, then circuit structure is simpler, but additional decoding circuits are required for digital-to-analog converters
Solution Approach 1:
The patent combines the level shift function and decoding function into a single integrated circuit module. The output control modules simultaneously perform voltage level conversion and decode the input signals to generate multiple output signals, eliminating the need for separate decoding circuits and improving circuit integration efficiency
Solution Approach 2:
The patent designs the level shift circuit to perform multiple functions: voltage level conversion, signal decoding, and multi-output signal generation. This multi-functional design allows the single circuit to replace what would traditionally require separate level shift and decoding circuits, reducing overall system complexity
Data Source
AI summary
The present application provides a level shift circuit, an integrated circuit, and an electronic device. The level shift circuit comprises: an input module, configured to output a first control signal according to a first power supply voltage signal, first and second input voltages, inverted voltages of the first and second input voltages that received; a control voltage generation module, configured to receive the first control signal, and generate a plurality of node voltages according to the first control signal and a second power supply voltage signal; and output control modules, configured to generate first to fourth output signals according to the second power supply voltage signal and the node voltages.