Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Synthesizer
Reexamination Certificate
2011-05-31
2011-05-31
Donovan, Lincoln (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Synthesizer
Reexamination Certificate
active
07952396
ABSTRACT:
An AWG includes a waveform memory providing a digital waveform signal at a sample rate and an arbitrary factor interpolator (AFI) coupled to receive the digital waveform signal or a processed digital waveform signal. A complex mixer for carrier modulation is coupled to the AFI which outputs a complex band pass signal. A DAC is coupled to an output of the complex mixer for receiving the complex band pass signal to provide an analog output signal. A fixed frequency sample clock clocks the DAC to provide a fixed DAC sample rate. The DAC provides a data clock signal to a sample request controller that generates a sample request signal that is coupled to the waveform memory for requesting the digital waveform signal from the waveform memory. The interpolated digital signal is sampled at the fixed DAC sample rate independent of the sample rate of digital waveform signal.
REFERENCES:
patent: 7340357 (2008-03-01), Ammerman et al.
patent: 2010/0164555 (2010-07-01), Takahashi et al.
Hunter, et al. “Direct IF Synthesis of Vector Modulated Signals Using Real-Time Signal Processing” IEEE International Instrumentation and Measurement Technology Conference Victoria, Vancouver Island, Canada, May 12-15, 2008.
Hunter Matthew T.
Mikhael Wasfy B.
DME Corporation
Donovan Lincoln
Jetter & Associates, P.A.
Rojas Daniel
University of Central Florida Research Foundation Inc.
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