Accession Number : ADD011903

Title :   Clock Distribution Circuit for Active Aperture Antenna Array.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Bellman,B M

Report Date : 04 Jun 1985

Pagination or Media Count : 6

Abstract : A system for communicating a time reference or clock signal to a plurality of processors over substantial distances where propagation time between units is significant compared to the processing time. The timing signal is in the form of two continuous sinusoidal waves of different frequency but equal amplitude, which are added to give equal contributions in the resultant composite, two frequency, sum signal. The resulting waveform has sharply defined nulls occurring at the difference which are used as a precise time reference. (Author)

Descriptors :   *PATENTS, *TIME SIGNALS, *ANTENNA ARRAYS, *CLOCKS, *ANTENNA APERTURES, DIGITAL SYSTEMS, DIFFERENCE FREQUENCY, CONTINUOUS WAVES, PHASE SHIFT CIRCUITS, TIME STANDARDS, NULLS(AMPLITUDE), PROCESSING, DISTRIBUTION, TIME, CIRCUITS, FREQUENCY, SIGNALS

Subject Categories : Electrical and Electronic Equipment
      Non-radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE