Location History:
- Freiburg i.Br., DE (1987)
- Freiburg-Hochdorf, DE (1988)
- Freiburg, DE (1988 - 1990)
- Siegen, DE (1990)
Company Filing History:
Years Active: 1987-1990
Title: Dietmar Ehrhardt: Innovator in Television Technology
Introduction
Dietmar Ehrhardt is a notable inventor based in Freiburg i.Br., Germany. He has made significant contributions to the field of television technology, holding a total of 5 patents. His work focuses on enhancing the quality and efficiency of television receiving systems.
Latest Patents
Ehrhardt's latest patents include a frequency conversion circuit for a color television channel. This invention allows for the conversion of a color television channel, which includes both video and sound channels, from the RF band directly to the baseband using analog quadrature conversion. The quadrature output signals are digitized, and a correcting stage eliminates quadrature errors, forming a corrected quadrature pair that drives both a video stage and a sound conversion stage. The sound conversion stage features at least one sound channel converter that converts the low-IF sound channel to its baseband through another digital quadrature conversion.
Another significant patent is for a television receiving section that incorporates only a single A/D converter. This design minimizes the interface between the analog and digital portions of the system. The A/D converter is strategically positioned after the intermediate-frequency stage and operates at approximately 20 MHz. The digital portion includes both a video channel and an audio channel, with the video channel featuring a band-pass filter and the audio channel utilizing a quadrature mixer for effective signal processing.
Career Highlights
Dietmar Ehrhardt is currently employed at Deutsche Itt Industries GmbH, where he continues to innovate in the field of television technology. His work has been instrumental in advancing the capabilities of television receiving systems, making them more efficient and effective.
Collaborations
Ehrhardt has collaborated with notable coworkers such as Otmar Kappeler and Hermannus Schat. Their combined expertise has contributed to the successful development of various technologies in the television industry.
Conclusion
Dietmar Ehrhardt's contributions to television technology through his innovative patents have significantly impacted the industry. His work continues to pave the way for advancements in how we receive and process television signals.