Patent · US Active

Direct conversion receiver and calibration method thereof

US8761708B2 · kind B2 · utility

3Cited by
9References
19Claims
0Family size

Assignee

Inventors

Key dates

Filing dateJul 9, 2012
Grant dateJun 24, 2014
Priority date—
Expiry dateFeb 4, 2033

Classification

  • Technology area (CPC H)Electricity
  • CPC primaryH04B15/04
  • WIPO fieldTelecommunications
  • WIPO sectorElectrical engineering

Abstract

A direct conversion receiver including a mixer, a measuring module and a calibration module is provided. When the calibration module adjusts the switch duty cycle of the mixer to being shorter than a standard duty cycle, a first second-order inter-modulation distortion is measured. When the calibration module adjusts the switch duty cycle to being longer than the standard duty cycle, a second second-order inter-modulation distortion is measured. According to the measured distortions, the calibration module determines a calibration signal and provides the calibration signal to the mixer, so as to allow the mixer to have a calibrated duty cycle.

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