Company Filing History:
11 out of 657 
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Years Active: 2007-2025
Title: The Innovative Journey of John Birkbeck
Introduction
John Birkbeck, an accomplished inventor based in New Milton, GB, is known for his significant contributions to the field of electronics and amplification technologies. With a remarkable portfolio of 15 patents, Birkbeck continues to push the boundaries of innovation in his area of expertise.
Latest Patents
Among his latest inventions are the following:
1. **Bias Techniques for Amplifiers with Mixed Polarity Transistor Stacks** - This patent presents various methods and circuit arrangements for biasing gates of stacked transistor amplifiers. The amplifier can operate in multiple modes, utilizing a closed loop with a feedback error voltage based on a sensed voltage from the common node of the transistor stacks. Key elements include adjusting gate biasing voltages by current mirrors controlled by feedback error voltage, as well as maintaining fixed gate biasing voltages between consecutive gate voltages.
2. **Low Loss Reflective Passive Phase Shifter Using Time Delay Element with Double Resolution** - This phase shifter alters the phase of a radio frequency signal using a Lange coupler and artificial transmission lines. The length of these lines is adjustable via digital control, with transistors strategically placed to provide paths to ground. By selectively activating these transistors, Birkbeck can control the electrical length, thereby introducing specific phase delays as needed.
Career Highlights
Throughout his career, John Birkbeck has made notable advancements in electronics, reflecting his dedication to the field of invention and innovation. He has worked with Psemi Corporation and Roke Manor Research Limited, where he contributed to cutting-edge projects that leverage his expertise in amplification and phase shifting technologies.
Collaborations
Birkbeck's innovative journey has been marked by collaborations with skilled professionals. Notable coworkers include Kashish Pal and Vikas Sharma, with whom he has shared knowledge and insights to foster advancements in technology.
Conclusion
John Birkbeck exemplifies the spirit of innovation in the world of electronics. His contributions, encapsulated in 15 patents, highlight his commitment to developing solutions that enhance electronic performance. As he continues his journey, Birkbeck remains a source of inspiration for aspiring inventors.