Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
Reexamination Certificate
2006-02-28
2006-02-28
Ferguson, Keith (Department: 2683)
Telecommunications
Transmitter and receiver at same station
Radiotelephone equipment detail
C455S431000, C455S403000, C455S569200, C455S550100, C455S090300, C455S422100, C455S500000, C701S003000, C701S024000, C701S029000, C434S029000, C340S935000, C340S951000
Reexamination Certificate
active
07006850
ABSTRACT:
Communication devices, such as a radio and a cockpit communication panel, digitally communicate audio signals as digital data without use of a synchronizing clock signal between the devices. The communication panel and the radio function as both a receiver and as a transmitter of digital audio signals. In one embodiment, an analog audio signal is received by the transmitting device and transformed by a coder/decoder (CODEC) into a plurality of signals. The plurality of signals is received and transformed by a field programmable gate array (FPGA) into a digital signal that includes framing pulse and stop bits. The digital signal is transmitted to a FPGA in a receiving device, which transforms the signal into a second plurality of signals. A CODEC in the receiving device transforms the second plurality of signals into an analog audio signal.
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patent: 2003/0054817 (2003-03-01), Goldberg et al.
James Timothy
Johnson Timothy
Ferguson Keith
Garmin International, Inc.
Terrell David L.
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