Photonic FFT processor

Details Photonic FFT processor Photonic FFT processor

1996-11-14

1999-09-14

Moise, Emmanuel L.

Electrical computers: arithmetic processing and calculating

Electrical digital calculating computer

Particular function performed

708407, G06F 1500

Patent

active

059516275

ABSTRACT:
A high-performance photonic chipset for computing 1-D complex fast Fourier transform (FFT) calculations. Flip-chip integration is used to combine submicron CMOS ICs with GaAs chips containing 2-D arrays of multiple-quantum wells (MQW) diode optical receivers and transmitters on each chip in the set. Centralized free-space optical interconnection offers higher throughput rates, greater external bandwidth and reduced chip count compared to conventional electronic FFT devices using hard-wired interconnection between chips. The memory addressing used provides one-to-one interconnections for memory transfers between computational stages that are compatible with several known three-dimensional free-space optoelectronic packaging technologies and dual-port memory is used to permit simultaneous read-write access to adjacent addresses in the data banks needed by each stage.

REFERENCES:
patent: 4689762 (1987-08-01), Thibodeau, Jr.
patent: 5034910 (1991-07-01), Whelchel et al.
patent: 5093801 (1992-03-01), White et al.
patent: 5233551 (1993-08-01), White
patent: 5365470 (1994-11-01), Smith

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