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Infinite Input Impedance Biopotential Amplifier
University of California System: University of California, San Diego Technology Transfer Office
posted on 07/26/2010
Existing contact-less biopotential sensor designs assume a large coupling capacitance, which assumes adequate mechanical force to press the sensing plate to the body. The relatively large input capacitance of commercially available amplifiers presents a significant design challenge for sensors that capacitively couple signals.
Suggested Uses
This invention is useful as a high-performance impedance converter bridging an ultra-high source impedance sensor or transducer with subsequent amplification and signal processing circuits. Applications include cellular microelectrode amplifiers, contact-less biopotential sensors, and free-space electric field sensors.
Detailed Description
The amplifier design invented by UC San Diego researchers presents two major improvements: 1) a single amplifier with extremely high input resistance and low input capacitance (femto-farads) without the need for adjustment; and 2) self-biased with novel on-chip, low-leakage, low-noise structures.
File Number: 21018
Other Information:
Related cases
See also SD2010-311 for a related technology.
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This innovation currently is not available for online licensing. Please contact University of California, San Diego Technology Transfer Office at University of California System: University of California, San Diego Technology Transfer Office for more information.
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