Telecommunications – Receiver or analog modulated signal frequency converter – Frequency modifying or conversion
Reexamination Certificate
2001-05-08
2004-01-06
Tran, Pablo N (Department: 2684)
Telecommunications
Receiver or analog modulated signal frequency converter
Frequency modifying or conversion
C455S307000, C455S330000, C455S333000, C333S177000, C333S125000, C333S209000
Reexamination Certificate
active
06675005
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention relates to broadband RF downconverter mixers (used in television and satellite receivers) that operate up into the gigaHertz range of frequencies. As is well known, operations at such frequencies make component configurations, circuit layout, lead lengths and placement extremely critical. This is one of the reasons conventional ferrite core type coils and transformer hybrids are difficult to use in high frequency broadband RF mixer circuits. Another reason is the loss associated with the ferrite material. The present invention utilizes the printed circuit construction techniques, disclosed and claimed in application Ser. No. 08/815,561 above, for producing a precision RF downconverter mixer that minimizes lead length problems, reduces losses and avoids much costly and time consuming labor.
OBJECTS OF THE INVENTION
A principal object of the invention is to provide a novel RF downconverter mixer.
Another object of the invention is to provide a printed circuit type RF downconverter mixer.
REFERENCES:
patent: 4619001 (1986-10-01), Kane
patent: 5062149 (1991-10-01), Hulderman et al.
patent: 5115217 (1992-05-01), McGrath et al.
patent: 5125111 (1992-06-01), Trinh
patent: 5266963 (1993-11-01), Carter
patent: 5303419 (1994-04-01), Ittipiboon et al.
patent: 5307518 (1994-04-01), Maeda et al.
patent: 5339462 (1994-08-01), Staudinger et al.
patent: 5428840 (1995-06-01), Sadhir
patent: 5430895 (1995-07-01), Huusko
patent: 5465416 (1995-11-01), Yanagimoto
patent: 5551074 (1996-08-01), Vice
patent: 5633613 (1997-05-01), MacDonald
patent: 5705960 (1998-01-01), Izumiyama
patent: 5745017 (1998-04-01), Ralph
patent: 5790945 (1998-08-01), Erickson
patent: 5903827 (1999-05-01), Kennan et al.
patent: 5917386 (1999-06-01), Dobrovolny
patent: 5920245 (1999-07-01), Ishikawa et al.
patent: 5987315 (1999-11-01), Nishida
patent: 6026286 (2000-02-01), Long
patent: 6064872 (2000-05-01), Vice
patent: 6115594 (2000-09-01), Pozdeev et al.
patent: 2023954 (1970-11-01), None
Tran Pablo N
Zenith Electronics Corporation
LandOfFree
Printed single balanced downconverter mixer does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Printed single balanced downconverter mixer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Printed single balanced downconverter mixer will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3200101