An 8-bit Integrate-and-Sample Receiver for Rate-Scalable Photonic Analog-to-Digital Conversion

作者：Gathman Timothy D^*; Buckwalter James F

来源：IEEE Transactions on Microwave Theory and Techniques, 2012, 60(12): 3798-3809.

DOI：10.1109/TMTT.2012.2222042

• Analog integrated circuits (ICs)
• analog signal processing
• analog-to-digital conversion
• analog/mixed signal
• broadband communications
• optical communication systems
• optical sampling

Jitter limitations pose significant challenges for high-resolution and sampling-rate analog-to-digital converters (ADCs). This paper describes an integrate-and-sample (IAS) receiver suitable for use in an optical parametric photonic ADC. Rate-scalable photonic-sampling techniques provide low-jitter optical sampling and analog-to-digital conversion of the wideband signal up to 10 GHz and beyond. An 8-bit 2-GS/s IAS receive channel is described for a rate-scalable photonic ADC. Electronic measurements are shown for an RF tone and a photonic Gaussian pulse source and compared to simulations. A two-channel IAS array is fabricated in a 120-nm SiGe BiCMOS process and packaged onto a printed circuit board for integration into the photonic-sampling setup. A single 2-GS/s channel achieves a measured performance higher than 8.1 ENOB. The two-channel integrated circuit consumes 890 mA per channel from 5- and 2.5-V supplies and occupies an area of 1.6 x 2.0 mm(2).

• 出版日期2012-12