Frequency translation apparatus and method

Details Frequency translation apparatus and method Frequency translation apparatus and method

1991-12-13

1994-02-22

Kuntz, Curtis

Pulse or digital communications

Repeaters

Testing

375 86, 329306, 455205, H04L 2722

Patent

active

052895050

ABSTRACT:
The present patent application discusses a frequency translation apparatus for altering the effective frequency of the phase information of an input signal (115). The input signal (115) has a first phase (.theta.(t)) and a first frequency (f.sub.i). The phase of the input signal is extracted and digitized at a second frequency (f.sub.o), forming a second N-bit digital phase signal (.theta.'(t))(311). The frequency translation apparatus generates a third digital phase signal (319) which approximates the difference between .theta.(t) and .theta.'(t). Then, the frequency translation apparatus combines the second digital phase signal and the third digital phase signal, forming a fourth digital phase signal (307) substantially approximating the first phase signal.

REFERENCES:
patent: 4922206 (1990-05-01), Nicholas
patent: 4961206 (1990-10-01), Tomlinson et al.
patent: 5001724 (1991-03-01), Birgenbeier et al.
patent: 5049830 (1991-09-01), Yoshida
patent: 5058136 (1991-10-01), Kazecki et al.
patent: 5067139 (1991-11-01), Baker et al.

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