Pulse or digital communications – Receivers
Reexamination Certificate
2006-11-21
2006-11-21
Ghebretinsae, Temesghen (Department: 2611)
Pulse or digital communications
Receivers
C375S327000, C455S189100
Reexamination Certificate
active
07139329
ABSTRACT:
A receiver has a low spurious level and a high frequency precision without increasing power consumption of a local oscillator. The receiver comprises first and second local oscillators; a phase locked loop operating based on an output of the first local oscillator; a first mixer for receiving an RF signal or an IF signal, and converting the received signal to a second IF signal according to an output signal of the phase locked loop; an analog-to-digital converter for converting an output signal of the first mixer to a digital signal; a second mixer for converting the digital signal to a detection process frequency according to an output of the second local oscillator; and a filter for bandpass filtering, interposed between the first mixer and the analog-to-digital converter or between the analog-to-digital converter and the second mixer.
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Dilworth and Barrese LLP
Ghebretinsae Temesghen
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