Digital phase shifter

Details Digital phase shifter Digital phase shifter

1988-04-04

1989-06-20

Heyman, John S.

Electrical pulse counters, pulse dividers, or shift registers: c

Systems

Having phase shift

328 55, 307512, H03K 5153, H03K 5135

Patent

active

048415529

ABSTRACT:
A novel digital phase shifter is provided for accomplishing digital phase shifting without the requirement of complex multiplication. The phase shifter includes buffer registers for receiving and storing the inphase and quadrature components of a complex number and for storing in a phase command register the information indicative of the phase shift to be accomplished. The phase shifting apparatus comprises a command map for generating a plurality of plus or minus phase shift command bits. A plurality of plus or minus phase shift registers are coupled to the phase shift command bits for performing plus or minus phase shifts of predetermined angles that diminish by a factor of approximately one-half from the previous phase shift angle.

REFERENCES:
patent: 3517323 (1970-06-01), Rudin
patent: 4431969 (1984-02-01), Summers et al.
patent: 4649553 (1987-03-01), Madni et al.
patent: 4675612 (1987-06-01), Adams et al.
patent: 4700347 (1987-10-01), Rettberg et al.

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