| US 7,592,863 B2 | ||
| Optimized gain filtering technique with noise shaping | ||
| Hassan Elwan, Lake Forest, Calif. (US); Amr Fahim, Newport Beach, Calif. (US); Edward Youssounan, Irvine, Calif. (US); Ahmed A. Emira, Lake Forest, Calif. (US); and Dejun Wang, Irvine, Calif. (US) | ||
| Assigned to Newport Media, Inc., Lake Forest, Calif. (US) | ||
| Filed on May 30, 2007, as Appl. No. 11/755,125. | ||
| Prior Publication US 2008/0297239 A1, Dec. 04, 2008 | ||
| Int. Cl. H03K 5/00 (2006.01) | ||
| U.S. Cl. 327—552 [327/559] | 20 Claims |
| 1. A noise shaping and voltage gain filtering electrical circuit comprising:
an input terminal that receives an input electrical signal;
a pair of input resistors directly connected to said input terminal;
a filter positioned in between said pair of input resistors and wherein said filter comprises a Frequency Dependent Negative
Resistance (FDNR) circuit, a resistor in series with said FDNR circuit, and a first capacitor in parallel with said FDNR circuit
and said resistor;
a feedback resistor; and
an amplifier that amplifies said electrical signal, wherein said amplifier is directly connected to said feedback resistor
and one of the input resistors,
wherein said FDNR circuit comprises a second capacitor for blocking DC offset in said amplifier,
wherein when said input terminal receives said input electrical signal, said filter creates a short circuit at an out of band
region of said electrical signal thereby filtering signal blockers out of said electrical signal prior to said electrical
signal reaching said amplifier, and
wherein noise generated by said FDNR circuit and said resistor is high pass filtered by said first capacitor thereby moving
said noise to said out of band region of said electrical signal.
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