Patent · US Active

Radio frequency peak detection with subthreshold biasing

US9229460B1 · kind B1 · utility

1Cited by
3References
20Claims
0Family size

Assignee

Inventors

Key dates

Filing dateJul 1, 2014
Grant dateJan 5, 2016
Priority date—
Expiry dateJul 1, 2034

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG05F1/46
  • WIPO fieldControl
  • WIPO sectorInstruments

Abstract

A radio-frequency peak amplitude detection circuit includes a load capacitor, a current source that charges the load capacitor and set the bias current for the field effect transistors, and a pair of field effect transistors. The gates of the field effect transistors are biased at a level below the threshold voltage of the transistors. The transistors are arranged in parallel with the capacitor and are operable to drain the capacitor at a rate determined by a differential input at the gates of the transistors. The voltage across the load capacitor is low-pass filtered and has a voltage level representative of the amplitude of the differential input signal.

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