Process for the analog-to-digital conversion of microwave signal

Details Process for the analog-to-digital conversion of microwave signal Process for the analog-to-digital conversion of microwave signal

1993-05-17

1995-01-10

Hoff, Marc S.

Coded data generation or conversion

Analog to or from digital conversion

Using optical device,

341155, H03M 100

Patent

active

053811470

ABSTRACT:
An optical analog to digital converter for microwave signals in which the input to a Mach-Zehnder modulator/interferometer is split into two branches which are provided with respective laser carrier signals having a difference frequency equal to a desired conversion frequency. An input microwave signal is then used to modulate the carrier signal present in one of the input branches to the interferometer, and the resulting output signal is detected and compared with a predetermined threshold value to generate a binary 1 or 0 output. In a preferred embodiment, a plurality of such interferometers are arranged in a parallel configuration and the modulation of the respective carrier signals is scaled by a factor of two.

REFERENCES:
patent: 4325603 (1982-04-01), Marom
patent: 4502037 (1985-02-01), Le Parquier et al.
patent: 4571576 (1986-02-01), Olsson et al.
patent: 4947170 (1990-08-01), Falk

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