Chaotic Signal Generator Circuit Without LC Resonators
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Solution Overview
Problem
Conventional chaotic signal generators for ultra wide band communication systems require large chip areas due to inductors, leading to increased costs and poor reproducibility due to sensitivity to current, and have complex technical interpretations.
Innovation Solution
A chaotic signal generator using inverter type amplifiers and ring-type oscillators to generate chaotic signals with a mixer and filter, reducing chip size and improving reproducibility by employing CMOS inverter structures and level damping resistors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If an LC resonator is used to generate chaotic signals, then the signal generation function is achieved, but the chip area increases and energy efficiency decreases
Solution Approach 1:
The patent extracts and removes the LC resonator component from the chaotic signal generator circuit. By eliminating the inductor L and capacitor C that form the resonator, the design achieves significant reduction in chip area and energy consumption while maintaining chaotic signal generation capability through alternative circuit topology using transistors and resistors
Solution Approach 2:
The patent substitutes the physical LC resonator (electromagnetic resonance system) with an electronic circuit implementation using active devices (transistors Q1-Q3) and passive components (resistors R1-R6). This replacement transitions from a resonant-based mechanism to a non-linear electronic system that generates chaos through transistor switching and feedback, eliminating the need for large inductors and capacitors
2Ease of manufacture
If an LC resonator is used to generate chaotic signals, then the signal generation function is achieved, but the chip price increases due to large chip area
Solution Approach 1:
The patent extracts and removes the LC resonator component from the chaotic signal generator circuit. By eliminating the inductor L and capacitor C that form the resonator, the design achieves significant reduction in chip area and energy consumption while maintaining chaotic signal generation capability through alternative circuit topology using transistors and resistors
Solution Approach 2:
The patent replaces expensive, area-consuming inductors with cheaper, compact resistor-transistor combinations. The new implementation uses standard CMOS transistors and small resistors that are cheaper and occupy less chip area, making the overall device more cost-effective for mass production
3Reliability
If an LC resonator is used to generate chaotic signals, then the signal generation function is achieved, but the reproducibility decreases due to sensitivity to current
Solution Approach 1:
The patent changes the operating parameters and circuit topology from LC resonance-based to transistor-based non-linear dynamics. By using transistors in a feedback configuration with resistors, the system achieves chaotic behavior through voltage and current non-linearities rather than resonant oscillation, reducing sensitivity to current variations and improving reproducibility across different operating conditions
Solution Approach 2:
The patent implements feedback mechanisms through the transistor circuit configuration where output signals are fed back to influence the operating point. The feedback loops created by resistors R1-R6 and transistor connections stabilize the chaotic behavior and reduce sensitivity to current variations, improving reproducibility
Data Source
AI summary
In a chaotic signal generator, a first signal generator generates a first signal. The first signal includes a first fundamental wave having a preset first frequency and a plurality of harmonic waves of the first fundamental wave. A second signal generator generates a second signal. The second signal includes a second fundamental wave having a preset second frequency and a plurality of harmonic waves of the second fundamental wave. Also, a mixer mixes the first signal from the first signal generator with the second signal from the second signal generator to generate a chaotic signal having a sum frequency of the first and second signals and the harmonic waves of the first and second signals. A filter passes a signal of a preset band out of the chaotic signal from the mixer.