Company Filing History:
2 out of 2,729 
1 out of 53 
1 out of 33,490 
Years Active: 1977-1992
Title: The Innovations of Carl R Battjes
Introduction
Carl R Battjes is a notable inventor based in Portland, OR (US). He has made significant contributions to the field of electronics, holding a total of 3 patents. His work primarily focuses on advanced circuit designs that enhance the performance of electronic devices.
Latest Patents
One of Battjes' latest patents is an image canceling mixer circuit on an integrated circuit chip. This innovative IF mixer circuit employs a pair of doubly balanced mixers, with one mixer receiving a local oscillator reference signal in phase and the other receiving it in quadrature phase. A phase shift circuit adds an additional 90-degree phase shift to the output of the second mixer. The in-phase and out-of-phase signals are then applied to a summing circuit, which effectively attenuates unwanted mixer products while reinforcing the desired IF signal. The balanced elements of the phase shift circuit utilize a transistor with equal emitter and collector resistances, along with a diode-connected transistor and a collector-to-base capacitor. This design ensures a constant-amplitude phase shift in a unity gain structure, independent of current, allowing for precise phase adjustments. Additionally, emitter current can be adjusted to compensate for production variations in fixed resistance values.
Another significant patent is the monolithic wideband amplifier. This invention modifies a Darlington-connected transistor pair by adding a third transistor, resulting in a three-terminal composite transistor wideband amplifier. The current gain of this amplifier is approximately double that of a single transistor, showcasing Battjes' innovative approach to enhancing electronic performance.
Career Highlights
Throughout his career, Carl R Battjes has worked with prominent companies such as Tektronix, Inc. and Seiko Corporation. His experience in these organizations has contributed to his expertise in electronic circuit design and innovation.
Collaborations
Battjes has collaborated with notable individuals in the field, including Don H Atherly and Harvey Leon Golladay. These partnerships have likely influenced his work and contributed to his success as an inventor.
Conclusion
Carl R Battjes is a distinguished inventor whose contributions to electronic circuit design have led to multiple patents and advancements in technology. His innovative spirit and collaborative efforts continue to inspire future developments in the field.