Binary Waveform Synthesis With Segmented Pulses for Lower Harmonics
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Solution Overview
Problem
Existing methods for generating binary waveforms to approximate analog waveforms suffer from high harmonic content and complex implementation due to frequent level alternations or require additional filters to reduce harmonics, complicating synchronous measurements.
Innovation Solution
A method and device that convert analog waveforms into discrete-level segments, then into binary pulses with uniform or non-uniform time steps, optimizing discrete levels for best approximation, and optionally adding a correction waveform to minimize harmonics, using microcontroller-based generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If delta-sigma modulation is used to approximate analog waveforms by binary signals, then the binary signal can be generated, but the resulting binary signal has frequent alternation of signal levels and contains many higher harmonic components
Solution Approach 1:
The patent divides the binary waveform generation into multiple discrete levels (e.g., -3, -1, 1, 3) rather than simple binary levels. Each level is assigned a specific weight and duration, creating a segmented approximation of the analog waveform that reduces harmonic content while maintaining generation simplicity.
Solution Approach 2:
The patent changes the parameters of the binary signal by introducing multiple amplitude levels with different weights instead of simple binary levels. By optimizing the duration and weight of each level segment, the method achieves better waveform approximation with reduced harmonics.
2Ease of manufacture
If pulse-width modulation (PWM) with natural sweep is used to generate binary signals, then the approximating binary signal can be generated, but there are relatively many harmonic components requiring complex additional analog filter
Solution Approach 1:
The patent segments the waveform into discrete levels with optimized durations and weights, which inherently reduces harmonic content before the signal leaves the generator. This eliminates the need for complex external filtering circuitry.
Solution Approach 2:
Instead of treating harmonics as a problem to be filtered out, the patent converts the harmonic reduction into a benefit by optimizing the discrete level structure itself to minimize harmonic generation at the source, thereby eliminating the need for additional filtering components.
3Productivity
If uniform sampling PWM is used to generate binary signals, then the binary signal can be generated with fixed time period, but the resulting signal still has many harmonic components
Solution Approach 1:
The patent changes the amplitude parameter structure by introducing multiple discrete levels with different weights rather than simple binary levels. By optimizing both the amplitude weights and duration of each level, the method maintains fast generation speed while significantly reducing harmonic content.
Data Source
AI summary
A method and device for synthesizing binary waveforms, wherein the initial analogue waveform is first converted into the segments with discrete levels, then each said discrete level section is in turn converted into a binary pulse of the same time duration as the given segment, and the average value of the generated pulse is proportional to the average value of the given initial waveform over the time duration of the given segment.