Atacama Large Millimeter Array Demultiplexer design based on a custom GaAs chip
Abstract
In the ALMA sampler the input data, sampled at 4 Gs/s, is transmitted to the fiber optic formatter in a parallel demultiplexed data stream composed of 16 x 250 MHz samples. Several different approaches have been proposed for the demultiplexer, as no commercial units are available at this frequency. We propose a scheme based on a custom digital GaAs chip. The chip architecture, the global demultiplexer architecture and results from simulations are presented.
- Publication:
-
Arcetri Technical Report #4
- Pub Date:
- June 2002
- Bibcode:
- 2002atr..rept....4C