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Negative impedance circuit and corresponding equipment

A technology of negative impedance, electronic equipment, applied in the direction of simulation of negative resistance network, amplifier input/output impedance improvement, amplifier with semiconductor device/discharge tube, etc.

Pending Publication Date: 2020-07-28
STMICROELECTRONICS SRL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] These known devices may exhibit limitations related to, for example, an undesirably high ratio of resistances included in the negative feedback path, which may translate into limitations of the input signal dynamics

Method used

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  • Negative impedance circuit and corresponding equipment
  • Negative impedance circuit and corresponding equipment
  • Negative impedance circuit and corresponding equipment

Examples

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Embodiment Construction

[0020] In the ensuing description, one or more specific details are presented in order to provide an in-depth understanding of examples of the described embodiments. Embodiments may be presented without one or more of the specific details, or without other methods, components, materials, etc. In other instances, known structures, materials, or operations are not shown or described in detail so that certain aspects of the embodiments are not obscured.

[0021] References to "an embodiment" or "one embodiment" in the framework of this specification are intended to indicate that a particular configuration, structure or characteristic described with respect to the embodiment is included in at least one embodiment . Thus, phrases such as "in an embodiment" or "in one embodiment" that may appear at one or more points in this specification do not necessarily refer to one and the same embodiment. Furthermore, particular configurations, structures or characteristics may be combined i...

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Abstract

The embodiment of the invention relates to a negative impedance circuit and corresponding equipment. The negative impedance circuit includes: a differential circuit stage; a positive feedback path from an output of the differential circuit stage to a first input of the differential circuit stage; and a negative feedback path from an output of the differential circuit stage to a second input of thedifferential circuit stage. The negative feedback path includes a first transistor, and a unity gain path from an output of the differential circuit stage to a second input of the differential circuit stage, the unity gain path coupled to ground via a reference impedance. The positive feedback path includes a second transistor. The first transistor and the second transistor are coupled in a current mirror arrangement and have respective control electrodes configured to be driven by an output of the differential circuit stage, where the negative impedance circuit induces a negative impedance at a first input of the differential circuit stage.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to Italian Patent Application No. 102019000000883 filed on January 21, 2019, which is incorporated herein by reference. technical field [0003] The present disclosure relates generally to electronic systems and methods, and in particular embodiments, to negative impedance circuits and corresponding devices. Background technique [0004] Various types of analog circuits benefit from the possible use of negative impedance circuits. [0005] Furthermore, various types of devices are known and employed for providing a negative impedance circuit. [0006] Circuits employing both positive and negative feedback together are examples of such devices: for example, so-called negative capacitance converters are known, where high negative capacitances can be achieved in a process involving low density capacitors. [0007] These known devices may exhibit limitations related eg to an undesirably ...

Claims

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Application Information

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IPC IPC(8): H03H11/52
CPCH03H11/52H03F1/56H03F3/45183H03F2200/222H03F2200/369H03F2203/45676B06B1/0223B06B1/06H03F3/45475H03F2200/129H03F2200/156H03F2203/45116
Inventor A·巴拜利A·维多尼
Owner STMICROELECTRONICS SRL
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