FET Communication Circuit for Symmetric Low-Power Level Shifting
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Solution Overview
Problem
Existing communication circuits in electronic devices, such as air conditioners and washers, face issues with asymmetrical design, high standby power consumption, and inability to handle different voltage levels, making them prone to errors and requiring complex configurations to adjust communication speed.
Innovation Solution
The use of field effect transistors (FETs) in both transmission and reception circuits allows for symmetrical design, reduces standby power consumption, and enables communication between processors with different voltage levels without changing the circuit configuration, by employing FETs to manage signal transmission and reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional communication circuits (resistance-capacitor or transistor-based) are used, then communication functionality is achieved, but the transmission and reception circuits cannot be designed with symmetrical structure leading to high error likelihood
Solution Approach 1:
The patent applies asymmetry in reverse - it uses symmetrical circuit design where both transmission and reception circuits use identical FET-based structures. This symmetry eliminates design errors and improves reliability while maintaining communication functionality.
2Use of energy by stationary object
If traditional communication circuits are used, then communication is possible, but standby power is continuously consumed
Solution Approach 1:
The FET-based circuit enables periodic switching between transmission and reception states, allowing the circuit to enter low-power standby modes when not actively communicating, thereby reducing continuous power consumption while maintaining communication reliability.
3Adaptability or versatility
If traditional communication circuits are used, then communication between processors is possible, but processors with different voltage levels cannot communicate
Solution Approach 1:
The FET-based communication circuit can operate across different voltage levels by adjusting the FET threshold voltage parameter, enabling voltage level translation without changing the overall circuit configuration. This provides adaptability for processors with different voltage levels.
4Speed
If traditional communication circuits are used, then communication speed can be varied, but circuit configuration must be changed to adjust speed
Solution Approach 1:
The FET-based circuit allows dynamic adjustment of communication speed by changing operational parameters such as switching frequency or voltage levels, without requiring physical circuit reconfiguration. This provides flexible speed control while maintaining circuit simplicity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enables reliable and efficient signal transmission and reception with reduced error likelihood and power consumption, allowing for flexible communication speed adjustments without circuit changes, even between processors with different voltage levels.
Implementation Method 1
a transmission circuit configured to generate a transmission signal by using a signal input from a first control circuit and a first field effect transistor (FET)
Data Source
AI summary
A communication device is disclosed. The disclosed communication device comprises: a transmission circuit for generating a transmission signal by using a first field effect transistor (FET) and a signal inputted from a first control circuit, and transmitting the transmission signal to a second control circuit; and a reception circuit for generating a reception signal by using a second field effect transistor (FET) and a signal received from the second control circuit, and outputting the reception signal to the first control circuit.