Philip R Merrill, Deceased

Title: Philip R Merrill: Innovator in RF Technology

Introduction

Philip R Merrill was a notable inventor known for his contributions to radio frequency (RF) technology. He was based in Nashua, NH (US) and held a total of 2 patents during his career. His work has had a lasting impact on the field of telecommunications.

Latest Patents

Merrill's latest patent, titled "Spurious Frequency Suppressor," addresses the suppression of spurious frequencies in transmitters. This invention features an RF pulse fall time controller circuit that includes a quadrature hybrid matched attenuator positioned between a predriver and the first stage of class 'C' driver amplifiers. The circuit is designed to linearly attenuate RF pulses while slowing the pulse fall time. The operation begins when the rising edge of a pretrigger activates a pretrigger generator, which subsequently triggers the application of current bias to the attenuator circuit. After a controlled duration, the circuit reduces the forward current bias of PIN diodes in the attenuator, increasing the diodes' series resistance and enhancing the attenuation of RF pulses. This results in a slower pulse fall time, effectively suppressing spurious emissions caused by parasitic ringing in the cascaded Class C common base transistor amplifiers within the transmitter.

Career Highlights

Merrill's career was marked by his association with Raytheon Company, where he applied his expertise in RF technology. His innovative work contributed significantly to advancements in telecommunications and electronic systems.

Collaborations

Throughout his career, Merrill collaborated with notable colleagues, including Peter R Drake and Thomas M O'Leary. These collaborations helped foster an environment of innovation and creativity in the field.

Conclusion

Philip R Merrill's contributions to RF technology and his innovative patents have left a significant mark on the industry. His work continues to influence advancements in telecommunications today.