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Un detector de uniones no-lineales, o NLJD … Un detector de uniones no-lineales, o NLJD (en sus iniciales en inglés), es un dispositivo que irradia una pequeña región de espacio con radiación RF de alta frecuencia. Cualquier unión no lineal en su alcance, particularmente una unión PN, recibirá esta energía, y debido a la naturaleza no lineal de la unión, esta la rectificará, re-emitiendo algo de ella en múltiplos de la frecuencia de radiación (ver Armónico). El detector posee un sensible recibidor sintonizado para captar estos Armónicos, así como procesamientos y displays para informar al usuario del dispositivo. Como la base de casi toda la electrónica de semiconductores es la unión PN, un NLJD es capaz de detectar casi todos los electrónicos sin , incluso si los sistemas están prendidos o apagados. Puede incluso detectar cosas que no son de naturaleza electrónica. El uso del dispositivo requiere un mínimo de habilidad y experiencia.iere un mínimo de habilidad y experiencia.
, The non-linear junction detector, or an NL … The non-linear junction detector, or an NLJD, is a device that illuminates a small region of space with high-frequency RF energy. Any "non linear junction" in the vicinity—for example, and particularly, the p-n junction—will receive this energy, and because of the asymmetric response of the junction to an electric field, it will mangle it, re-emitting some of it on multiples of the illumination frequency (see harmonic). The detector has a sensitive receiver tuned to these harmonics, as well as appropriate processing and displays to make their presence known to the user of the device.Because the basis of almost all semiconductor electronics is the p-n junction, an NLJD is correspondingly capable of detecting almost any unshielded electronic device containing semiconductors, whether the electronics are actively powered or not. In its basic form, an NLJD can also detect things that are not themselves electronic in nature, so the use of the device requires a modicum of skill and experience. For example, a rusty nail inside a wall can give a false positive. For this reason, most modern NLJDs examine the ratio between the second and the third harmonic of the illumination frequency. When a true (electronic) p-n junction is encountered, the second harmonic will generally be stronger than the third.will generally be stronger than the third.
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| rdfs:comment |
Un detector de uniones no-lineales, o NLJD … Un detector de uniones no-lineales, o NLJD (en sus iniciales en inglés), es un dispositivo que irradia una pequeña región de espacio con radiación RF de alta frecuencia. Cualquier unión no lineal en su alcance, particularmente una unión PN, recibirá esta energía, y debido a la naturaleza no lineal de la unión, esta la rectificará, re-emitiendo algo de ella en múltiplos de la frecuencia de radiación (ver Armónico). El detector posee un sensible recibidor sintonizado para captar estos Armónicos, así como procesamientos y displays para informar al usuario del dispositivo. para informar al usuario del dispositivo.
, The non-linear junction detector, or an NL … The non-linear junction detector, or an NLJD, is a device that illuminates a small region of space with high-frequency RF energy. Any "non linear junction" in the vicinity—for example, and particularly, the p-n junction—will receive this energy, and because of the asymmetric response of the junction to an electric field, it will mangle it, re-emitting some of it on multiples of the illumination frequency (see harmonic). The detector has a sensitive receiver tuned to these harmonics, as well as appropriate processing and displays to make their presence known to the user of the device.Because the basis of almost all semiconductor electronics is the p-n junction, an NLJD is correspondingly capable of detecting almost any unshielded electronic device containing semiconductors, whether the elecontaining semiconductors, whether the elec
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| rdfs:label |
Detector de uniones no lineares
, Nonlinear junction detector
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