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Charge-amplifier electronic circuit

Authors: Ramos-Martos, J.;

Charge-amplifier electronic circuit

Abstract

[ES] El circuito objeto de la presente invención está orientado a su uso en amplificadores de carga, proporcionando una estabilización continua de su punto de operación. La invención es especialmente apropiada para circuitos integrados, en los que la realización de resistencias de alto valor es costosa en área, e introduce parásitos importantes. Mediante el circuito objeto de la presente invención se ha demostrado la posibilidad de construir resistencias de más de 100 gigaohmios. Campos específicos de aplicación son: sensores microelectromecánicos capacitivos, transductores ópticos y piezoeléctricos, y en cualquier aplicación que requiera la medida de carga acumulada o la integración de corriente eléctrica. La invención es igualmente adecuada para su realización en circuitos integrados que necesiten constantes de tiempo muy largas, como integradores o filtros analógicos.

[EN] The invention relates to an electronic circuit and to the use thereof in charge amplifiers, such as to provide continuous stabilisation from the operating point thereof. The invention is particularly suitable for integrated circuits in which the provision of high-value resistors is costly in terms of area and introduces significant interferences. The inventive circuit demonstrates that it is possible to construct resistors of more than 100 gigaohms. The invention can be used in the following specific fields: microelectromechanical capacitive sensors, piezoelectric and optical transducers, and for any application that requires the measurement of the accumulated charge or the integration of electric current. The invention can also be used in integrated circuits which require very large time constants, such as analog filters or integrators.

Fecha de presentación internacional: 21.09.2004. - Titular: Consejo Superior de Investigaciones Científicas (CSIC)

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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