Patent · US Active

Process and temperature insensitive inverter

US8665005B2 · kind B2 · utility

7Cited by
10References
22Claims
0Family size

Assignee

Inventors

Key dates

Filing dateDec 2, 2011
Grant dateMar 4, 2014
Priority date—
Expiry dateJan 21, 2032

Classification

  • Technology area (CPC H)Electricity
  • CPC primaryH03K3/013
  • WIPO fieldBasic communication processes
  • WIPO sectorElectrical engineering

Abstract

The transition frequency of an inverter can vary with the transconductance of its internal transistors as a function of temperature and bias level. To maintain consistent transition frequency across temperatures, and therefore reduce the phase noise variation introduced by the inverter, systems, methods, and circuits are disclosed for biasing the inverter with a temperature varying current such that the transconductance of transistors remains constant across temperatures, while maintaining the lowest possible power consumption to do so. Various embodiments can include using current sources that have proportional-to-absolute-temperature (PTAT) devices.

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