Company Filing History:
Years Active: 1987-1988
Title: Otmar Kappeler: Innovator in Frequency Conversion Technology
Introduction
Otmar Kappeler is a notable inventor based in Neuenburg, Germany. He has made significant contributions to the field of frequency conversion technology, holding a total of 4 patents. His work has been instrumental in advancing television signal processing.
Latest Patents
Kappeler's latest patents include a frequency converting apparatus designed for converting an RF television signal. This invention features a frequency converter circuit that incorporates a tuner and a low-IF converter. The low-IF converter is capable of converting television signals to a low IF signal, which enhances adjacent-channel selectivity through the use of low-pass filters. Additionally, the low-IF converter includes a phase-correcting stage and an amplitude-correcting stage for the two quadrature-signal paths. By digitizing these signal paths after the initial quadrature mixing process, the stability of amplitude and phase is further improved.
Another significant patent addresses the frequency conversion of an RF signal transmitted for color television. This method utilizes a suitable frequency reversal, transforming the frequencies of the picture carrier, chrominance subcarrier, and at least one sound carrier into the baseband. This transformation ensures that the frequencies of the transformed picture carrier and chrominance subcarrier coincide. To mitigate the spurious signals that can cause annoying moire effects on the screen, a frequency offset is applied, moving the spurious signal into a frequency range that is less perceptible to viewers.
Career Highlights
Otmar Kappeler is currently employed at Deutsche Itt Industries GmbH, where he continues to innovate in the field of frequency conversion technology. His work has garnered attention for its practical applications in enhancing television signal quality.
Collaborations
Kappeler has collaborated with notable colleagues such as Dietmar Ehrhardt and Hermannus Schat, contributing to the advancement of technology in their field.
Conclusion
Otmar Kappeler's contributions to frequency conversion technology have made a lasting impact on the television industry. His innovative patents reflect his dedication to improving signal processing and enhancing viewer experience.