Pulse or digital communications – Receivers
Reexamination Certificate
2005-08-19
2010-12-28
Ghayour, Mohammad H (Department: 2611)
Pulse or digital communications
Receivers
C375S324000, C375S335000, C375S340000, C375S346000, C375S350000, C455S313000, C455S334000
Reexamination Certificate
active
07860189
ABSTRACT:
Disclosed are hybrid heterodyne transmitters and receivers for use in communications systems, or other systems, and the corresponding methods for hybrid heterodyne transmitting and receiving. A heterodyne receiver for converting a continuous time modulated signal to a discrete time digital baseband signal includes a sigma-delta modulator. The sigma-delta modulator is a sigma-delta analog-to-digital converter constructed and arranged to receive a modulated signal at an RF carrier frequency and provide a quantized output at a first intermediate frequency. The heterodyne receiver may also include a digital mixer constructed and arranged to receive a data stream quantized by the sigma-delta analog-to-digital converter and receive a signal at a second mixing frequency. The digital mixer then provides digital signals representative of a baseband signal suitable for digital signal processing.
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Alvermann John M.
Jadus Brian
Petilli Eugene M.
Washburn Clyde
Daly, Crowley & Mofford & Durkee, LLP
Ghayour Mohammad H
Intrinsix Corporation
Vlahos Sophia
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