Modulators – Amplitude modulator – Nonlinear device controlled by modulating signal
Patent
1987-08-28
1989-06-27
Grimm, Siegfried H.
Modulators
Amplitude modulator
Nonlinear device controlled by modulating signal
332 18, 332 21, 332 22, 375 10, 375 39, H03C 500
Patent
active
048433519
ABSTRACT:
A novel vector signal generator is provided which includes a vector modulator controlled by baseband manipulation circuitry. The output signal from the vector modulator is down converted to a desired output frequency. The baseband manipulation circuitry provides, under digital control from, for example, a microprocessor, adjustments to the phase, carrier leakage, and modulation levels of the I and Q signals. In this manner, a highly accurate vector modulated signal is generated within a wide range of carrier frequencies.
REFERENCES:
patent: 4006418 (1977-02-01), Liskov et al.
patent: 4258436 (1981-03-01), Campbell
patent: 4717894 (1988-01-01), Edwards et al.
Edwards Allen P.
Gildea David R.
Grimm Siegfried H.
Hewlett--Packard Company
Howard William H. F.
Wong Edward Y.
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