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Class Information
Number: 330/79
Name: Amplifiers > Signal feedback > Compensating for inter-electrode impedance (e.g., neutralization) > By transformer feedback
Description: Subject matter wherein the signal feedback for compensating for inter-electrode impedance is coupled back to the input from the output by means of a transformer.

Patents under this class:

Patent Number Title Of Patent Date Issued
8022776 Origami cascaded topology for analog and mixed-signal applications Sep. 20, 2011
7863978 RF amplifier system for neutralizing internal capacitance in a cavity Jan. 4, 2011
7843272 Low noise amplifier Nov. 30, 2010
7489192 Low-noise amplifiers Feb. 10, 2009
7432764 Push-pull amplifier with transformational negative feedback Oct. 7, 2008
7123090 Low-noise preamplifier, in particular, for nuclear magnetic resonance (NMR) Oct. 17, 2006
6639467 Alternating current derived from direct current Oct. 28, 2003
6566947 Combined active impedance and filter in line drivers May. 20, 2003
5164682 Two-port wideband bipolar transistor amplifiers Nov. 17, 1992
4777430 Circuit for determining the effective series resistance and Q-factor of capacitors Oct. 11, 1988
4598212 Driver circuit Jul. 1, 1986
4590434 High dynamic range amplifier with low noise and low distortion May. 20, 1986
4567443 Low-distortion audio amplifier circuit arrangement Jan. 28, 1986
4414690 Active aerial Nov. 8, 1983
4253070 Feedback arrangement Feb. 24, 1981

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