Telecommunications – Receiver or analog modulated signal frequency converter – Frequency modifying or conversion
Reexamination Certificate
2005-03-22
2005-03-22
Urban, Edward F. (Department: 2685)
Telecommunications
Receiver or analog modulated signal frequency converter
Frequency modifying or conversion
C455S313000, C455S333000, C327S359000
Reexamination Certificate
active
06871057
ABSTRACT:
A mixer circuit used in a radio receiver for mixing two frequencies and providing an intermediate frequency which is the difference of the two frequencies. Excellent image rejection is provided by decreasing an amplitude error and a phase error of an output IF signal in differential form.
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Tsukahara Tsuneo
Ugajin Mamoru
Armstrong Kratz Quintos Hanson & Brooks, LLP
Chow Charles
Nippon Telegraph and Telephone Corporation
Urban Edward F.
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