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For the Inventor, By the Inventor

Laguna Beach, CA, United States of America

Ralph A Duncan

USPTO Granted Patents = 13

Average Co-Inventor Count = 3.2

ph-index = 8

Forward Citations = 289(Granted Patents)


Location History:

  • Laguna Beach, CA (US) (2002 - 2006)
  • Brentwood, CA (US) (2006 - 2011)

Company Filing History:

goldMedal13 out of 11,124 
 
Broadcom Corporation
 patents

Years Active: 2002-2011

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13 patents (USPTO):Explore Patents
1. 8045066 - Fully integrated tuner architecture (2011-10-25),
2. 7821581 - Fully integrated tuner architecture (2010-10-26),
3. 7423699 - Fully integrated tuner architecture (2008-09-09),
4. 7092043 - Fully integrated tuner architecture (2006-08-15),
5. 7053697 - System for tuning a corner frequency of a low pass filter (2006-05-30),
6. 7019598 - Integrated VCO having an improved tuning range over process and temperature variations (2006-03-28),
7. 6930545 - Switched-capacitor, common-mode feedback circuit for a differential amplifier without tail current (2005-08-16),
8. 6894557 - Method for tuning a corner frequency of a low pass filter (2005-05-17),
9. 6803829 - Integrated VCO having an improved tuning range over process and temperature variations (2004-10-12),
10. 6781451 - Switched-capacitor, common-mode feedback circuit for a differential amplifier without tail current (2004-08-24),
11. 6710644 - Low pass filter corner frequency tuning circuit and method (2004-03-23),
12. 6577184 - Switched-capacitor, common-mode feedback circuit for a differential amplifier without tail current (2003-06-10),
13. 6426680 - System and method for narrow band PLL tuning (2002-07-30),

Title: The Innovations of Ralph A. Duncan

Introduction

Ralph A. Duncan is a prominent inventor based in Laguna Beach, California. He holds an impressive portfolio of 13 patents, showcasing his contributions to the field of integrated circuit technology. His work primarily focuses on advancements in receiver architecture, which have significant implications for communication systems.

Latest Patents

One of Ralph A. Duncan's latest patents is the "Fully Integrated Tuner Architecture." This invention describes an integrated receiver that implements channel selection and image rejection on a single CMOS integrated circuit. The receiver front end features programmable attenuation and a programmable gain low noise amplifier. The frequency conversion circuitry utilizes LC filters integrated onto the substrate, in conjunction with image reject mixers, to achieve sufficient image frequency rejection. The design includes on-chip filter tuning and inductor Q compensation over temperature, employing multi-track spiral inductors. Local oscillators are used to tune substitute filters, and frequency scaling is applied to match component values. The architecture also incorporates advanced local oscillator signal generation methods, including PLL out-of-band local oscillation and direct synthesis for in-band local oscillators. A differential crystal oscillator serves as a frequency reference, and differential signal transmission is utilized throughout the receiver.

Career Highlights

Ralph A. Duncan has made significant strides in his career, particularly through his work at Broadcom Corporation. His innovative designs and patents have contributed to the advancement of communication technologies, making him a key figure in the industry.

Collaborations

Ralph has collaborated with notable colleagues, including Tom W. Kwan and Pieter Vorenkamp. Their combined expertise has fostered an environment of innovation and creativity within their projects.

Conclusion

Ralph A. Duncan's contributions to integrated circuit technology and his extensive patent portfolio highlight his role as a leading inventor in the field. His work continues to influence advancements in communication systems, showcasing the importance of innovation in technology.

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