Company Filing History:
Years Active: 1992
Title: Randal R Gingrich: Innovator in Amplifier Technology
Introduction
Randal R Gingrich is a notable inventor based in Belleville, MI (US). He has made significant contributions to the field of amplifier technology, holding 2 patents that showcase his innovative approach to electronic design.
Latest Patents
One of his latest patents is a voltage-controlled amplifier using an operational amplifier. This invention employs an operational amplifier with negative feedback to set the gain. A voltage variable resistance, such as a junction-field-effect transistor (JFET), is utilized as part of a variable voltage divider for controlling the amplifier gain. Resistors in series and parallel with the JFET determine the minimum and maximum resistances, corresponding to the upper and lower limits for the amplifier gain. This design allows for multiple channels of an amplifier to maintain closely matched characteristics, even when using separate JFETs with unmatched characteristics.
Another significant patent is the multichannel amplifier with gain matching. This invention employs field-effect transistors to vary the gain of operational amplifiers in each respective channel. Gain matching is achieved by providing each channel with a respective DC bias voltage, compensating for differences in pinch-off voltage of the field-effect transistors. This innovation permits the use of inexpensive, unmatched JFETs in the amplifier, resulting in very accurate stereo imaging in audio systems.
Career Highlights
Randal R Gingrich is currently associated with Ford Motor Company Limited, where he applies his expertise in amplifier technology. His work has contributed to advancements in audio systems and electronic devices.
Collaborations
He has collaborated with notable coworkers, including Nicholas Lawrence Difiore and Max H Behrens, who have also contributed to the field of electronics.
Conclusion
Randal R Gingrich's innovative patents and contributions to amplifier technology highlight his role as a significant inventor in the electronics industry. His work continues to influence the design and functionality of audio systems today.