Circuit and method for processing an automatic frequency...

Details Circuit and method for processing an automatic frequency... Circuit and method for processing an automatic frequency...

2005-11-15

2005-11-15

Liu, Shuwang (Department: 2634)

Pulse or digital communications

Receivers

Automatic frequency control

C375S132000, C375S213000, C455S181100, C455S208000, C455S265000

Reexamination Certificate

active

06965653

ABSTRACT:
An integrated demodulator tuning circuit (10, 60) receives differential currents at input terminals (12, 46) and provides an AFC signal at an output terminal (48). The AFC current characteristic has a dead band (72) in the output current generated when the integrated demodulator tuning circuit (10, 60) operates under the condition where the difference between the currents supplied at the input terminals (12and46) is at or below a set threshold value. The set threshold value is determined by the relative sizes of the transistors (14, 16and20, 36, 38and40) that form the current mirrors connected to the input terminals (12, 46).

REFERENCES:
patent: 3764917 (1973-10-01), Rhee
patent: 4208741 (1980-06-01), Brun et al.
patent: 4247834 (1981-01-01), Brun et al.
patent: 4267602 (1981-05-01), Brun et al.
patent: 4277695 (1981-07-01), Wilber et al.
patent: 4370520 (1983-01-01), Malchow
patent: 4578594 (1986-03-01), Santos
patent: 5382921 (1995-01-01), Estrada et al.
patent: 5463353 (1995-10-01), Countryman et al.
patent: 5500878 (1996-03-01), Iwasaki
patent: 5650749 (1997-07-01), Main
patent: 5703478 (1997-12-01), Main
patent: 6023491 (2000-02-01), Saka et al.
patent: 6121847 (2000-09-01), Katznelson et al.
patent: 6133802 (2000-10-01), Ma
patent: 6369659 (2002-04-01), Delzer et al.
patent: 1 093 227 (2001-04-01), None
patent: 57041018 (1982-06-01), None
PCT/US01/49444 PCT Search Report mailed Nov. 7, 2002.

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