Telecommunications – Receiver or analog modulated signal frequency converter
Reexamination Certificate
2008-05-20
2008-05-20
Nguyen, Simon (Department: 2618)
Telecommunications
Receiver or analog modulated signal frequency converter
C455S197200, C455S232100, C455S324000, C455S333000, C455S340000
Reexamination Certificate
active
07376400
ABSTRACT:
A communications system comprising a processor, a variable oscillator, a radio frequency (RF) quadrature demodulator, a variable capacitor, a continuous-time, sigma-delta analog-to-digital converter (ADC), and a frequency divider, all integrated on a single semiconductor chip. The ADC samples the RF quadrature demodulator output. The processor sets the communications system frequency by controlling the oscillator, the frequency divider and the variable capacitor.
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Bellaouar Abdellatif
Fontaine Paul-Aymeric
Brady III Wade J.
Neerings Ronald O.
Nguyen Simon
Telecky , Jr. Frederick J.
Texas Instruments Incorporated
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