Patent · US Expired

Low noise buffer circuit for increasing digital signal transition slew rates

US6144240A · kind A · utility

4Cited by
7References
23Claims
0Family size

Assignee

Inventor

Key dates

Filing dateJun 1, 1999
Grant dateNov 7, 2000
Priority date
Expiry dateJun 1, 2019

Classification

  • Technology area (CPC H)Electricity
  • CPC primaryH03K19/0013
  • WIPO fieldBasic communication processes
  • WIPO sectorElectrical engineering

Abstract

A low noise buffer circuit for increasing the slew rates of transitions between signal states of a digital signal while drawing minimal transient power supply current during such signal state transitions. Successive alternating digital signal inversion circuits conduct respective power supply source and sink currents which: are unregulated source currents and regulated sink currents during respective low-to-high output signal transitions; transition from unregulated source currents and regulated sink currents to regulated source currents and unregulated sink currents, respectively, during respective high output signal states; are regulated source currents and unregulated sink currents during respective high-to-low output signal transitions; and transition from regulated source currents and unregulated sink currents to unregulated source currents and regulated sink currents, respectively, during respective low output signal states.

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