Telecommunications – Receiver or analog modulated signal frequency converter – Frequency modifying or conversion
Reexamination Certificate
2006-08-08
2006-08-08
To, Doris H. (Department: 2682)
Telecommunications
Receiver or analog modulated signal frequency converter
Frequency modifying or conversion
C455S333000, C455S292000, C455S338000, C327S357000, C327S359000
Reexamination Certificate
active
07088982
ABSTRACT:
A stacked Gilbert cell mixer performs two frequency conversions in at least one of a wireless transmitter and receiver and includes a first stage of the stacked Gilbert cell mixer that converts a voltage signal input to the stacked Gilbert cell mixer to a current signal. A second stage of the stacked Gilbert cell mixer communicates with said first stage of the stacked Gilbert cell mixer and performs a first frequency conversion. A third stage of the stacked Gilbert cell mixer communicates with the second stage of the stacked Gilbert cell mixer and performs a second frequency conversion. Said first stage includes first and second transistors, said second stage includes third, fourth, fifth and sixth transistors and said third stage includes seventh, eighth, ninth and tenth transistors.
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IEEE Standard 802.11b (Sep. 16, 1999; 96 pages); Supplement to IEE Standard for Information Technology; Telecommunicatio0ns and Information Exchange Between Systems; Local and Metropolitan Area Networks; Specific Requirements; Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) specifications; Higher-Speed Physical Layer Extension in the 2.4 GHz Band.
Dao Minh
Marvell International Ltd.
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