Digital Emulation of Analog Circuits with Tolerance Modeling
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Solution Overview
Problem
Digital audio processors lack the 'life' and depth of analog devices, leading to a preference for analog equipment in audio recording, as they fail to accurately model the variations in analog circuit elements like resistors and capacitors, which significantly impact audio performance.
Innovation Solution
A digital emulation method that models analog circuits by randomizing the working values of individual elements within specified tolerance ranges, creating multiple instances of a digital channel that mimic the variations found in real-world analog units, rather than relying on a single 'golden unit' for emulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If digital processors are used to replace analog devices, then productivity and precision are improved, but the audio quality and realism deteriorate
Solution Approach 1:
The patent changes the parameters of the digital emulation by introducing randomized tolerance ranges for circuit elements. Instead of using fixed nominal values, the system varies resistance, capacitance, and other parameters within specified tolerance ranges to replicate analog behavior. This allows digital processors to maintain efficiency while achieving analog-like audio quality through parameter variation.
Solution Approach 2:
The patent introduces dynamic behavior to digital emulations by randomly selecting different tolerance values for circuit elements. This creates variability across multiple instances of the same analog device emulation, making the digital system adapt its behavior to match the natural variations found in analog hardware, thereby improving audio realism.
2Manufacturing precision
If a single golden unit is used for emulation, then manufacturing precision is improved, but adaptability deteriorates
Solution Approach 1:
The patent creates a universal emulation framework that can represent multiple analog device variations through a single digital model. By incorporating tolerance ranges and randomization, one digital emulation can generate multiple distinct audio characteristics, making the system versatile enough to emulate different instances of analog devices while maintaining manufacturing precision through consistent methodology.
Solution Approach 2:
The system achieves adaptability by changing parameters within tolerance ranges. Instead of creating separate emulations for each analog unit, the patent varies electrical parameters like resistance and capacitance within specified tolerances to generate diverse audio outcomes from a single digital model, thereby achieving both precision and versatility.
3Reliability
If analog devices are used, then audio quality is improved, but device complexity increases
Solution Approach 1:
The patent replaces physical analog circuitry with digital simulations that incorporate tolerance modeling. Instead of building complex analog devices with varying components, the system uses digital signal processing with randomized parameter selection to replicate analog behavior, thereby maintaining audio quality while reducing physical device complexity.
Solution Approach 2:
The patent creates digital copies of analog devices that include tolerance variations. By copying the electrical characteristics and variability of analog components in a digital environment, the system achieves analog-like audio quality without the complexity of physical analog circuitry, allowing for easier implementation and modification.
Data Source
AI summary
A digital emulation of an analog device with tolerance modeling is disclosed. In operation, a model of an analog circuit is provided. The model includes the location of each individual element in the analog circuit. The model also includes a working value for each individual element as well as a tolerance range for each individual element. A randomized working value is then generated for one or more of each individual element based on the tolerance range and the working value. A digital emulation of the analog circuit is performed. The digital emulation uses the randomized working value for one or more of the each individual element and the working value for any remaining of each individual element. The digital emulation is then provided to a user for use in a digital environment.