CIRCUIT FOR REDUCING AMPLIFIER NOISE AND NEGATIVE IMPEDANCE

CIRCUIT FOR REDUCING AMPLIFIER NOISE AND NEGATIVE IMPEDANCE

The invention provides a circuit, which includes a first operational amplifier having an inverting input and a non-inverting input; and a negative resistance circuit connected to the inverting input of the operational amplifier. The negative resistance circuit includes a second operational amplifier...

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Hauptverfasser: COONEY, PATRICK, JEONG, TAEHOON
Format: Patent
Sprache:chi ; eng
Schlagworte:
AMPLIFIERS
BASIC ELECTRONIC CIRCUITRY
ELECTRICITY
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creator COONEY, PATRICK
JEONG, TAEHOON
description The invention provides a circuit, which includes a first operational amplifier having an inverting input and a non-inverting 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 cross-coupled transistor circuit having at least one transistor biased by a current produced by the current source. By using the technical scheme, the internal noise of the operational amplifier can be reduced and circuit instability cannot be caused.
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The negative resistance circuit includes a second operational amplifier, a current source controlled by the second operational amplifier, and a cross-coupled transistor circuit having at least one transistor biased by a current produced by the current source. 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The negative resistance circuit includes a second operational amplifier, a current source controlled by the second operational amplifier, and a cross-coupled transistor circuit having at least one transistor biased by a current produced by the current source. By using the technical scheme, the internal noise of the operational amplifier can be reduced and circuit instability cannot be caused.</abstract><oa>free_for_read</oa></addata></record>
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subjects AMPLIFIERS
BASIC ELECTRONIC CIRCUITRY
ELECTRICITY
title CIRCUIT FOR REDUCING AMPLIFIER NOISE AND NEGATIVE IMPEDANCE
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