Patent ID: 7592863

Claim:
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.