Waveform Shaping Circuit With Switched Inductance to Prevent Ringing
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Solution Overview
Problem
Existing semiconductor integrated circuits struggle to shape waveforms with high accuracy, particularly in preventing unwanted ringing while enhancing rising and falling edges of signals.
Innovation Solution
A semiconductor integrated circuit with a waveform shaping circuit that dynamically switches between two inductance values, using switches and an inductive network to increase inductance during signal edges and decrease it during non-edge periods, thereby preventing ringing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a fixed inductance value is used in the waveform shaping circuit, then the circuit structure is simple, but the waveform shaping accuracy is insufficient and unwanted ringing cannot be prevented
Solution Approach 1:
The patent applies the dynamics principle by making the inductance value variable instead of fixed. The waveform shaping circuit dynamically switches between a first inductance value and a second inductance value based on the signal state. During rising or falling edges, the first inductance value is used to enhance edge sharpness, while during stable periods, the second inductance value is used to prevent ringing, thus achieving high waveform shaping accuracy without excessive complexity.
Solution Approach 2:
The patent applies the parameter changes principle by changing the inductance parameter of the inductive network. A switching circuit is employed to alternate between two different inductance values (first inductance value and second inductance value). This parameter switching enables the circuit to optimize waveform shaping during transitions and prevent ringing during stable states, resolving the contradiction between shaping accuracy and circuit complexity.
2Shape
If a large inductance value is used continuously, then rising and falling edges are enhanced, but unwanted ringing occurs during stable periods
Solution Approach 1:
The patent applies the periodic action principle by periodically switching the inductance value based on the signal state. The switching circuit alternates between the first inductance value during rising/falling edges and the second inductance value during stable periods. This periodic switching ensures that edge enhancement is applied only when needed, while ringing is prevented during stable periods, thus resolving the contradiction between edge sharpness and ringing prevention.
Solution Approach 2:
The patent applies the local quality principle by applying different inductance values to different phases of the signal. During rising or falling edges, the first inductance value is applied locally to enhance edge sharpness. During stable periods, the second inductance value is applied locally to prevent ringing. This spatial-temporal differentiation of inductance values resolves the contradiction between edge enhancement and ringing prevention.
3Object-generated harmful factors
If a small inductance value is used continuously, then ringing is prevented, but rising and falling edges are not enhanced
Solution Approach 1:
The patent applies the dynamics principle by dynamically adjusting the inductance value based on signal conditions. The waveform shaping circuit switches to the first inductance value during rising or falling edges to enhance edge sharpness, and switches to the second inductance value during stable periods to prevent ringing. This dynamic adjustment resolves the contradiction between edge enhancement and ringing prevention.
Solution Approach 2:
The patent applies the parameter changes principle by changing the inductance parameter according to signal phase. The switching circuit alternates between first and second inductance values, applying the appropriate parameter value at the appropriate time. This enables the circuit to prevent ringing during stable periods while enhancing edges during transitions, resolving the contradiction between ringing prevention and edge sharpness.
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 approach allows for precise shaping of waveforms with enhanced rising and falling edges, while effectively preventing unwanted ringing, thus improving signal quality and reducing jitter.
Implementation Method 1
a rising edge or a falling edge of a waveform of the signal is enhanced
Implementation Method 2
the rising or falling edges of the waveform is not enhanced
Data Source
AI summary
A semiconductor integrated circuit including a waveform shaping circuit is provided. The waveform shaping circuit receives a signal. The waveform shaping circuit operates with a first inductance value in a first period. During the first period, a rising edge or a falling edge of a waveform of the signal is enhanced. The waveform shaping circuit operates with a second inductance value in a second period. During the second period, the rising or falling edges of the waveform is not enhanced. The first inductance value is larger than the second inductance value.