Telecommunications – Receiver or analog modulated signal frequency converter – With particular receiver circuit
Reexamination Certificate
2006-07-11
2006-07-11
Kuntz, Curtis (Department: 2643)
Telecommunications
Receiver or analog modulated signal frequency converter
With particular receiver circuit
C455S232100, C455S234200, C455S255000, C455S260000
Reexamination Certificate
active
07076233
ABSTRACT:
An amplitude modulation receiver including an antenna for receiving a signal and an input filter connected to the antenna. A variable gain amplifier is connected to the input filter and is responsive to a gain control signal. An A/D converter is connected to the variable gain amplifier and is responsive to a sampling signal and provides a sampled digital signal. A D/A converter receives a demodulated signal and provides an analog output signal. A controller receives and demodulates the sampled digital signal from the A/D converter, generates the gain control signal for the variable gain amplifier, generates the sampling signal for the A/D converter, and provides the demodulated signal to the D/A converter. The demodulation and generation of the gain control signal and the sampling signal are performed in software.
REFERENCES:
patent: 5278837 (1994-01-01), Kelley
patent: 5375146 (1994-12-01), Chalmers
patent: 6512472 (2003-01-01), Smith et al.
Barnes & Thornburg LLP
Kuntz Curtis
Sandbridge Technologies Inc.
Thier Michael T.
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