Patent · US Active

Negative impedance circuit for reducing amplifier noise

US11228283B2 · kind B2 · utility

0Cited by
4References
20Claims
0Family size

Assignee

Inventors

Key dates

Filing dateApr 6, 2020
Grant dateJan 18, 2022
Priority date
Expiry dateApr 6, 2040

Classification

  • Technology area (CPC H)Electricity
  • CPC primaryH03F2203/45276
  • WIPO fieldBasic communication processes
  • WIPO sectorElectrical engineering

Abstract

A circuit 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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.