Electronic tubes - transistor hybrid output stage
A true hybrid push-pull output stage integrates tubes and transistors using a mains transformer to enhance sound quality and bass reproduction, addressing the inconsistency in hybrid amplifiers by eliminating the air gap and isolating DC current.
Patent Information
- Application Number
- DE202025003288
- Authority / Receiving Office
- DE · DE
- Patent Type
- Utility models
- Current Assignee / Owner
- Filing Date
- 2025-10-29
- Publication Date
- 2025-12-31
- Estimated Expiration
- 2035-10-31
AI Technical Summary
Existing hybrid amplifiers are misleadingly termed 'hybrid' due to combining preamplifiers and power amplifiers, whereas the sonic character depends solely on the tube power amplifier stage, lacking true integration of tubes and transistors in the power amplifier, leading to inconsistent sound quality.
A true hybrid push-pull output stage is achieved by integrating a P- or ECL tube with a MOSFET output transistor, using a mains transformer with series-connected primary windings and a secondary winding split to isolate DC current, and incorporating a transformer to transfer both high- and low-impedance signals, eliminating the need for an air gap in the iron core and enhancing bass reproduction.
The solution provides a consistent sound quality by integrating tubes and transistors effectively, improving bass response and eliminating the need for an air gap in the transformer core, while maintaining impedance and preventing DC current from reaching the loudspeaker.