NEGATIVE IMPEDANCE CIRCUIT FOR REDUCING AMPLIFIER NOISE

A circuit includes a first operational amplifier having an inverting input and a noninverting input, and a negative resistance circuit connected to the inverting input of the operational amplifier. The negative resistance circuit includes a second operational amplifier, a current source controlled b...

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Bibliographische Detailangaben
Hauptverfasser:	COONEY, Patrick, JEONG, Taehoon
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	AMPLIFIERS BASIC ELECTRONIC CIRCUITRY ELECTRICITY IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS RESONATORS
Online-Zugang:	Volltext bestellen
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Beschreibung
Zusammenfassung:	A circuit includes a first operational amplifier having an inverting input and a noninverting input, and a negative resistance circuit connected to the inverting input of the operational amplifier. The negative resistance circuit includes a second operational amplifier, a current source controlled by the second operational amplifier, and a crosscoupled transistor circuit having at least one transistor biased by a current produced by the current source.