David J Gampell

Title: David J Gampell: Innovator in Optical Isolation Technology

Introduction

David J Gampell is a notable inventor based in Sunnyvale, CA (US). He has made significant contributions to the field of optical isolation technology, holding 2 patents that showcase his innovative approach to engineering.

Latest Patents

One of Gampell's latest patents is an "Optical Isolation Amplifier with Sigma-Delta Modulation." This invention provides an optical isolation amplifier that generates a low-noise analog output signal linearly related to an analog input signal. It conveniently fits within a conventional 8-pin dual in-line package. The optical isolation amplifier package includes an input chip with a sigma-delta analog-to-digital (A/D) converter, which converts an analog input signal to a digital signal. The sigma-delta converter modulates an off-chip LED, which optically transmits the signal to a photodetector on a separate output chip. This output chip features an accurate optical recovery section for reproducing the transmitted signal. Additionally, it contains a digital-to-analog (D/A) converter that converts the digital signal back to an analog output signal.

Another significant patent is titled "Circuits for Realizing an Optical Isolator." This invention involves an optical transmitter/receiver pair with an integrated CMOS circuit that provides current flow to a pre-biased solid-state light-emitting device (LED) in response to a digital input signal. The current flow is enhanced at the rising and falling edges of the input signal to improve the turn-on and turn-off speed of the LED. The LED is optically coupled to a photodiode that generates a current flow in response to illumination. The photodiode is shielded from spurious electronic noise by a transparent shield, and its output is amplified to produce an output voltage connected to a capacitively delayed voltage divider.

Career Highlights

David J Gampell is currently employed at Hewlett-Packard Company, where he continues to innovate and develop new technologies. His work has had a significant impact on the field of optical communications and isolation.

Collaborations

Throughout his career, Gampell has collaborated with notable colleagues, including Ralph E Lovelace and Michael D McJimsey. These collaborations have contributed to the advancement of technology in their respective fields.

Conclusion

David J Gampell is