Demonstration of a 5.12 GHz optoelectronics sampling circuit for analog-to-digital converters

Carlos Villa; Patrick Kumavor; Bruce Burgess; Eric Donkor

doi:10.1117/12.668902

19 May 2006 Demonstration of a 5.12 GHz optoelectronics sampling circuit for analog-to-digital converters

Carlos Villa, Patrick Kumavor, Bruce Burgess, Eric Donkor

Proceedings Volume 6236, Signal and Data Processing of Small Targets 2006; 623607 (2006) https://doi.org/10.1117/12.668902
Event: Defense and Security Symposium, 2006, Orlando (Kissimmee), Florida, United States

Abstract

In order to reduce the time jitter and increase the speed of the sampling circuits for Analog-to-Digital Converters (ADCs), optical techniques can be used since high speed optical pulses can be generated (in the order of GHz) with pulse width in the regime of femtoseconds. In this paper, we present an optoelectronic sampling circuit for an optical ADC with an aggregate 5.12 Gigasample/s and a time jitter of 80 fs. The RF signal to be sampled is connected to 8 sampling circuit in parallel. Each sampling channel consists of a reverse-biased photodiode that acts as a fast optoelectronic switch in series with a load resistor. A bias tee was used to couple the RF signal to be sampled, and the d.c. voltage to reverse bias the photodiodes. The DC offset RF signals was then connected to each channel and was sampled by actuating the photodiodes with a modelocked optical pulses having repetition rate of 640 MHz. A relative delay of 0.195 ns was set between the sampling clocks. Thus the sampling circuits sampled different phases of the RF. The outputs of the eight sampling circuits were multiplexed together to give an aggregate sampling rate of 5.12GSPS. Finally, a synchronizer trigger circuits was designed in order that all eight sampling circuits can be triggered for simultaneous measurement.

Citation Download Citation

Carlos Villa, Patrick Kumavor, Bruce Burgess, and Eric Donkor "Demonstration of a 5.12 GHz optoelectronics sampling circuit for analog-to-digital converters", Proc. SPIE 6236, Signal and Data Processing of Small Targets 2006, 623607 (19 May 2006); https://doi.org/10.1117/12.668902

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available