Frequency modulating device of an integrated circuit and a...

Details Frequency modulating device of an integrated circuit and a... Frequency modulating device of an integrated circuit and a...

2007-05-29

2007-05-29

Urban, Edward F. (Department: 2618)

Telecommunications

Transmitter and receiver at separate stations

Having measuring, testing, or monitoring of system or part

C455S067140, C455S226400

Reexamination Certificate

active

10444130

ABSTRACT:
A frequency modulating device includes a frequency generator for generating a frequency-modulated, first carrier and an input terminal to which a non-modulated second carrier is input. An amplifier amplifies the second carrier. A frequency converter receives the first and second carriers for producing an intermediate frequency signal and feeds the intermediate frequency signal to an output terminal. A band-pass filter limits the frequency band of the intermediate frequency signal to output a band-limited signal. A calculator calculates the spectrum distribution of the band-limited signal. The frequency generator, input terminal, amplifier, frequency converter and output terminal are included in a semiconductor device constructed on a semiconductor wafer in the form of integrated circuit.

REFERENCES:
patent: 6259314 (2001-07-01), Liu et al.
patent: 6816559 (2004-11-01), Sirito-Olivier et al.
patent: 6882827 (2005-04-01), Collier
patent: 2004/0148580 (2004-07-01), de Obaldia et al.
patent: 62-186073 (1987-11-01), None
patent: 5-28973 (1993-04-01), None
patent: 2000-131359 (2000-05-01), None

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