Telecommunications – Receiver or analog modulated signal frequency converter – Frequency modifying or conversion
Patent
1997-12-31
2000-11-07
Nguyen, Lee
Telecommunications
Receiver or analog modulated signal frequency converter
Frequency modifying or conversion
455326, 455313, 455314, 455112, 455113, 455118, 327113, 327116, 327119, H04Q 732
Patent
active
06144846&
ABSTRACT:
A frequency translation circuit (10) translates an incoming reference signal (RF.sub.IN) to a lower frequency using a compound mixer circuit (42). The compound mixer circuit (42) has a first mixer circuit (14A) that receives both the incoming reference signal (RF.sub.IN) and a signal generated by a first counter (28A). A second mixer circuit (14X) of the compound mixer circuit (42) receives a signal generated by a second counter (28X) and further translates the signal received from the first mixer circuit (14A) to a lower frequency. Both the first mixer circuit (14A) and the second mixer circuit (14X) generate output signals having a carrier frequency that is lower in frequency by the difference of the two input signals.
REFERENCES:
patent: 3753142 (1973-08-01), Nardin et al.
patent: 5220688 (1993-06-01), Tao
patent: 5303417 (1994-04-01), Laws
patent: 5410743 (1995-04-01), Seely et al.
patent: 5668505 (1997-09-01), Vu et al.
patent: 5790942 (1998-08-01), Le Corre et al.
"Introduction to Communication Systems", Third Edition, by Ferrel G. Stremler, Copyright 1990, Example 5.3.1, pp. 254-255.
Ferguson Keith
Motorola Inc.
Nguyen Lee
Parker Lanny L.
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