Single chip direct conversion transceiver for reducing DC...

Details Single chip direct conversion transceiver for reducing DC... Single chip direct conversion transceiver for reducing DC...

2006-08-29

2006-08-29

Urban, Edward F. (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

C455S217000, C455S293000, C455S333000, C329S306000, C329S318000, C331S018000, C331S063000

Reexamination Certificate

active

07099647

ABSTRACT:
A single chip direct conversion transceiver that includes a substrate on which a mixer unit and a local oscillator are provided as a circuit, and a positive hole formed between the mixer unit and the local oscillator and filled with a conductive plug to block signal leakage. A shield ground surface is formed above the substrate and blocks signal leakage occurring when the signals received through the antenna are input into the mixer and signal leakage occurring when the reference signal is input into the mixer from the local oscillator. A first interconnection is formed above the shield ground surface and connects the mixer unit and the local oscillator. Dielectric layers are formed between the substrate and the shield ground surface and on the shield ground surface to cover the first interconnection.

REFERENCES:
patent: 6175728 (2001-01-01), Mitama
patent: 6360087 (2002-03-01), Rozenblit et al.
patent: 6944436 (2005-09-01), Woo et al.
patent: 2003/0032401 (2003-02-01), Woo et al.
patent: 3-220823 (1991-09-01), None
Sekiguchi et al., “Ultra Small Sized Low Noise Block Downconverter Module”, Jun. 1, 1992.
Jeff Durec, “An Integrated Silicon Bipolar Receiver Subsystem for 900MHz Band Applications”, Sep. 28, 1997.

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