Patent · US Active

High performance CMOS radio frequency receiver

US8045943B2 · kind B2 · utility

18Cited by
2References
19Claims
0Family size

Assignee

Inventors

Key dates

Filing dateJan 29, 2008
Grant dateOct 25, 2011
Priority date
Expiry dateJun 30, 2030

Classification

  • Technology area (CPC H)Electricity
  • CPC primaryH03K3/35625
  • WIPO fieldBasic communication processes
  • WIPO sectorElectrical engineering

Abstract

A high performance radio frequency receiver includes a low noise amplifier with large binary and stepped gain control range, controlled impedance, and enhanced blocker immunity, for amplifying and converting a radio frequency signal to a current; a pulse generator for generating in-phase and quadrature pulses; a crossover correction circuit and pulse shaper for controlling a crossover threshold of the pulses and interaction between in-phase and quadrature mixers; and a double balanced mixer for combining the RF signal with the pulses to generate an intermediate frequency or baseband zero intermediate frequency current-mode signal. The in-phase and quadrature pulses have a duty cycle of 20-35%. The intermediate frequency signal and second order harmonics may be filtered with a high frequency low pass filter and a current injected complex direct-coupled filter. Decreased die size, current drain, cost, and complexity, as well as improvements in gain, 1/f noise, noise figure, sensitivity, and linearity may result.

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