Karl H Feistel

Title: **Inventor Spotlight: Karl H. Feistel**

Introduction

Karl H. Feistel, based in Munich, Germany, is an accomplished inventor known for his innovative work in electronic networks. With one significant patent to his name, Feistel has contributed to the field of adjustable transfer functions, paving the way for advancements in filter technology.

Latest Patents

Feistel's patent encompasses a four-terminal network that is selectively convertible into various types of filters, including low-pass, high-pass, band-pass, all-pass, and band-stop filters. This invention features three cascaded stages, each incorporating an operational amplifier with a grounded noninverting input. The design involves integrating-type amplifiers equipped with capacitive feedback circuits. The unique feedback connections and variable resistances allow for the determination of coefficients in a biquadratic equation, providing flexibility in signal processing.

Career Highlights

Karl H. Feistel is associated with Wandel & Goltermann GmbH & Co., where he continues to harness his expertise in electronic innovations. His work stands out for the complexity and adaptability of his designs, particularly in creating networks that can effectively manage various signal-transmission modes.

Collaborations

While specific collaboration details are not extensively documented, Feistel’s position at Wandel & Goltermann indicates potential partnerships with other professionals in the field. His innovative approaches likely facilitate interactions with fellow inventors and researchers, influencing advancements in electronic signal processing.

Conclusion

Karl H. Feistel exemplifies the spirit of innovation in the realm of electronic engineering. His patent showcases significant advancements in adjustable filter technology, highlighting his contributions to the field. As inventors like Feistel continue to innovate, the boundaries of electronic applications and technologies expand, offering new possibilities in various industries.