John E Parry

Title: **Innovative Contributions of John E. Parry in High Voltage Amplification and Motor Control**

Introduction

John E. Parry, an accomplished inventor based in Redondo Beach, CA, has made significant contributions to the fields of electronics and motor control. With a total of five patents to his name, Parry exemplifies the spirit of innovation that drives advancements in technology and engineering.

Latest Patents

Among his notable inventions is the **Class D high voltage amplifier system with adaptive power supply**. This system utilizes high voltage level shifting technology and features an adaptive power supply that adjusts the output voltage based on audio input levels. This innovation aims to minimize switching losses at low audio input levels while effectively eliminating DC offset at the output by maintaining equal positive and negative power supplies relative to ground.

Another significant patent is the **linear current sensing circuit for motor controller**. This circuit addresses the challenge of recovering signals offset by common mode displacement, particularly for voltage measurements across a current sense resistor located on the high side of a motor controller circuit. Parry's invention converts the voltage across the resistor into pulse code modulated data, downshifts it, and recovers the original signal for further processing, either as an analog output or a digital output.

Career Highlights

John E. Parry works at the International Rectifier Corporation, where his expertise and innovative spirit contribute to the company's success in power management solutions. His role involves the development of advanced technologies that push the boundaries of electrical engineering and product performance.

Collaborations

Throughout his career, Parry has collaborated with esteemed colleagues, including Thomas J. Ribarich and Ray J. King. These partnerships foster a creative environment where ideas can flourish, leading to groundbreaking inventions and advancements within their field.

Conclusion

John E. Parry's work demonstrates the impact of innovation on technological advancement. His patents reflect a deep understanding of electronic systems and the drive to create solutions that enhance performance and efficiency. As he continues to push the envelope in his field, Parry remains a pivotal figure in the realm of electronics and motor control.