Two-Stage Pulse Modulation for Accurate Product Pulse Streams
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Solution Overview
Problem
Existing pulse modulation techniques face challenges in accurately representing the product of two input factors, often resulting in synchronization issues, glitches, and inadequate representation of the input signal, particularly in applications like LED control systems where precise control of light intensity and color is required.
Innovation Solution
A pulse stream generator comprising a first pulse modulator, a logic AND block, and a second pulse modulator that multiplies the product of two input factors, ensuring accurate representation and eliminating synchronization problems by using basic digital blocks and a single source clock, thereby generating a pulse modulation stream that exactly represents the product value.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If conventional pulse modulation techniques are used to represent the product of two input factors, then the device complexity is reduced, but the manufacturing precision and reliability deteriorate due to synchronization issues, glitches, and inadequate signal representation
Solution Approach 1:
The multiplication operation is segmented into three distinct stages: first pulse modulator converts first input factor to pulse stream, logic AND block performs bitwise multiplication with second input factor, and second pulse modulator converts the product to final pulse modulation stream. This segmentation eliminates synchronization issues and glitches by breaking down the complex multiplication operation into manageable, sequential digital logic operations.
Solution Approach 2:
The logic AND block serves as an intermediary component between the two pulse modulators. It receives the pulse stream from the first modulator and the digital representation of the second input factor, performing bitwise logical operations to compute the product. This intermediary structure ensures accurate signal representation while maintaining device simplicity through standard digital logic blocks.
2Device complexity
If conventional pulse modulation techniques are used, then the device complexity is reduced, but the reliability deteriorates due to synchronization issues and glitches
Solution Approach 1:
By segmenting the multiplication process into distinct modular stages (first pulse modulator, logic AND block, second pulse modulator), each component operates independently with well-defined interfaces. This segmentation eliminates synchronization issues because each stage processes data at its own rhythm without requiring complex coordination with other stages, thereby improving reliability while keeping device complexity manageable.
Solution Approach 2:
Each component in the pulse stream generator performs its function autonomously using standard digital logic blocks. The first pulse modulator self-generates the pulse stream from the first input factor, the logic AND block self-performs the bitwise multiplication, and the second pulse modulator self-converts the product to the final pulse modulation stream. This self-service approach eliminates the need for complex external synchronization mechanisms, improving reliability.
3Device complexity
If conventional pulse modulation techniques are used, then the device complexity is reduced, but the manufacturing precision deteriorates due to inadequate representation of the input signal product
Solution Approach 1:
The segmentation of the multiplication operation into three distinct stages ensures that each stage contributes to accurate product representation. The first pulse modulator accurately converts the first input factor to a pulse stream, the logic AND block precisely performs bitwise multiplication with the second input factor, and the second pulse modulator accurately converts the product to the final pulse modulation stream. This segmented approach maintains manufacturing precision while avoiding the complexity of direct multiplication circuits.
Solution Approach 2:
The logic AND block acts as an intermediary that ensures precise computation of the product by performing bitwise logical operations between the pulse stream from the first modulator and the digital representation of the second input factor. This intermediary structure guarantees accurate signal representation by systematically processing each bit position, thereby improving measurement precision while maintaining device simplicity.
Data Source
AI summary
An embodiment method of generating an output pulse stream comprises first pulse modulating a first multi-bit input term to generate a first one-bit pulse stream, using a bitwise logic AND to combine the first one-bit pulse stream and a second multi-bit term, thereby generating a multi-bit AND output, and second pulse modulating the multi-bit AND output to generate a one-bit output pulse stream representing a product of the first and second multi-bit input terms.