Amplifiers – With semiconductor amplifying device – Including gain control means
Reexamination Certificate
2011-03-29
2011-03-29
Choe, Henry K (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including gain control means
C330S254000
Reexamination Certificate
active
07915956
ABSTRACT:
Variable attenuation systems having continuous input steering may be used to implement vector or quadrature modulators and vector multipliers. Discrete implementations of attenuators with continuous input steering may have two outputs which may be cross-connected to provide four-quadrant operation. A symmetrically driven center tap may provide improved zero-point accuracy.
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Choe Henry K
Marger Johnson & McCollom PC
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