Methods and apparatus for reducing thermal noise

Details Methods and apparatus for reducing thermal noise Methods and apparatus for reducing thermal noise

2007-11-20

2007-11-20

Deb, Anjan (Department: 2858)

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Parameter related to the reproduction or fidelity of a...

C324S076150, C374S175000

Reexamination Certificate

active

11001999

ABSTRACT:
Methods and apparatus for reducing the thermal noise integrated on a storage element are disclosed. One embodiment of the invention is directed to a sampling circuit comprising a sampling capacitor to store a charge, the sampling capacitor being exposed to an ambient temperature. The sampling circuit further comprises circuitry to sample the charge onto the capacitor, wherein thermal noise is also sampled onto the capacitor, and wherein the circuitry is constructed such that the power of the thermal noise sampled onto the capacitor is less than the product of the ambient temperature and Boltzmann's constant divided by a capacitance of the sampling capacitor. Another embodiment of the invention is directed to a method of controlling thermal noise sampled onto a capacitor. The method comprises an act of independently controlling the spectral density of the thermal noise and/or the bandwidth of the thermal noise.

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