Christopher Andrew Devries

Title: Christopher Andrew Devries: Innovator in Audio and Wireless Technology

Introduction

Christopher Andrew Devries is a notable inventor based in Ottawa, Canada. He has made significant contributions to the fields of audio amplification and wireless communication. With a total of 5 patents to his name, Devries continues to push the boundaries of technology.

Latest Patents

One of his latest patents is for a low-power class D amplifier using multistate analog feedback loops. This audio amplifier system features an audio CODEC/output path that utilizes analog class-D amplifiers. It employs Natural Sampling Pulse Width Modulation (PWM) to convert an analog input into a series of Rail-to-Rail pulses. The audio signal is encoded in the average value of the PWM pulse train and can be recovered through analog low pass filtering. The design includes a negative feedback loop to compare the output signal with the input signal, effectively suppressing non-idealities introduced by the Class-D switching stage. Additionally, the amplifier operates according to separate signal transfer and noise transfer functions, achieving optimal noise reduction at low power.

Another significant patent involves an RF-to-baseband receiver architecture. This improved receiver architecture allows for the use of a single synthesizer circuit for both RF-to-IF and IF-to-baseband conversion processes, resulting in lower power consumption. The receiver includes an injection locked local receiver oscillator (Rx LO) for the first mixing stage, enabling efficient RF-to-IF conversion. The design incorporates a tunable Q-enhanced IF filter and complex sub-sampling circuitry for the second conversion stage.

Career Highlights

Throughout his career, Christopher Andrew Devries has worked with several prominent companies, including Enq Semiconductor Inc. and Kleer Semiconductor Corporation. His work has focused on developing innovative solutions that enhance audio and wireless technologies.

Collaborations

Devries has collaborated with notable individuals in the industry, including Ralph Mason and Ronald Douglas Beards. These partnerships have contributed to his success and the advancement of his inventions.

Conclusion

Christopher Andrew Devries is a distinguished inventor whose work in audio amplification and wireless technology has led to multiple patents. His innovative designs continue to influence the industry and pave the way for future advancements.