LC Oscillation Circuit With Digital Amplitude Modulation
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Solution Overview
Problem
Existing transmitter oscillation circuits face challenges in achieving high-speed operation with low power consumption, as they often suffer from increased power consumption when using amplifiers and significant signal loss due to parasitic components, and have slow response times during high-speed operations.
Innovation Solution
The proposed transmitter incorporates a voltage adjuster to adjust the power supply voltage based on digital signals, an LC tank circuit for resonance signal generation, and a differential amplification circuit to modify the oscillation state, utilizing transistors and switches to control the amplitude of the resonance signal, thereby optimizing power usage and response speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If an amplifier is used for modulation, then the modulation function is achieved, but power consumption increases
Solution Approach 1:
The patent extracts the modulation function from a separate amplifier and integrates it directly into the oscillation circuit itself. The oscillation circuit generates different oscillation amplitudes based on digital input signals, eliminating the need for an external amplifier and reducing power consumption while maintaining the modulation function.
Solution Approach 2:
The patent merges the modulation function with the oscillation circuit by using the oscillation amplitude characteristics to represent digital signals. The oscillation circuit directly outputs modulated signals with varying amplitudes based on input data, combining what were previously separate functions into one integrated circuit.
2Extent of automation
If a manual switch is used for modulation, then the modulation function is achieved, but signal loss increases due to parasitic components
Solution Approach 1:
The patent replaces manual switches with a fully integrated electronic oscillation circuit that uses transistor-based amplitude control. This eliminates mechanical components and their associated parasitic elements, reducing signal loss while achieving the same modulation function through electronic means.
3Productivity
If the oscillation circuit operates at high speed, then the data transmission rate is improved, but the oscillation response speed becomes slower during high speed operation
Solution Approach 1:
The patent implements dynamic amplitude control where the oscillation circuit can rapidly switch between different oscillation amplitudes based on input digital signals. This dynamic operation allows the circuit to respond quickly to data changes, maintaining high oscillation response speed even during high-speed data transmission operations.
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 configuration enables high-speed operation with reduced power consumption and improved response efficiency, minimizing signal loss and maintaining oscillation even at lower power supply voltages.
Implementation Method 1
an LC tank circuit connected between first and second nodes and generating a resonance signal on a basis of the magnitude-adjusted power supply voltage
Data Source
AI summary
Provided is an oscillation circuit including a voltage adjuster adjusting a magnitude of a power supply voltage according to a digital signal, an LC tank circuit connected between first and second nodes and generating a resonance signal on a basis of the magnitude adjusted power supply voltage, and a differential amplification circuit oscillating the resonance signal or modifying an oscillation state of the resonance signal to output first and second output voltage signals to the first and second nodes, respectively.