Guitar amplifier system and method
US10680562B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Apr 15, 2019 |
| Grant date | Jun 9, 2020 |
| Priority date | — |
| Expiry date | Apr 15, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G2201/103
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A solid-state semiconductor guitar amplifier system/method mimicking the audio performance characteristics of conventional vacuum tube guitar amplifiers is disclosed. The disclosed system/method incorporates solid-state semiconductor circuitry implementing an input audio preamplifier (IAP) having asymmetric gain control (AGC) that feeds wave shape transformer (WST) circuitry implementing a piecewise/diode breakpoint (PDB) transform that emulates a conventional vacuum tube voltage-current transfer (VIT) characteristic. A breakpoint threshold controller (BTC) determines the offset associated with application of the PDB operation to the audio signal. Once the PDB transform has been applied to the audio signal, it is further processed by pick attack sag compressor (PAC) circuitry that applies positive sag control (PSC) and negative sag control (NSC) compression envelopes to the overall signal shape before presenting the resulting peak compressed signal through an audio volume control (AVC) and conventional solid-state semiconductor speaker power amplifier (SPA) for application to an audio speaker.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.