Noise mitigating quantizer for reducing nonlinear distortion in digital signal transmission
US10177776B1 · kind B1 · utility
3Cited by
3References
20Claims
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Key dates
| Filing date | Aug 4, 2017 |
| Grant date | Jan 8, 2019 |
| Priority date | — |
| Expiry date | Aug 4, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/4927
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A distortion mitigation quantizer circuit includes a pre-quantizer to generate a first quantized signal having L output signal levels from an input signal and a digital pulse-width-modulation (PWM) circuit to modulate the first quantized signal using M modulating carriers with PWM carrier frequency fp and according to an over sampling ratio (OSR) N in order to generate a second quantized signal. In this case, a number of the modulating carriers M is substantially equal to twice L/N.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.