Patents Assigned to SiTune Coporation
  • Patent number: 8265580
    Abstract: An incoming RF signal can be amplified in a RF front end of a RF receiver by conveying the signal through one of a multiple amplification paths. On each path, the gain can be controlled by RF automatic gain control (AGC) circuits. Each amplification path can be designed to handle incoming signals in a designated power range and to optimize receiver performance characteristics such as the noise figure (NF) and odd harmonic linearity in that power range. Signal power can be measured at different locations of the receiver and bypass switches can be used to convey the RF signals down one of the multiple paths based on the power measurements, according to executable logical code. An incoming signal power hysteresis can be applied to stabilize the system. Further, signal power averaging and switch delaying mechanisms can be employed to stabilize the system for rapidly fluctuating signals.
    Type: Grant
    Filed: November 17, 2009
    Date of Patent: September 11, 2012
    Assignee: SiTune Coporation
    Inventors: Mohammad Bagher Vahidfar, Vahid Mesgarpour Toosi, Saeid Mehrmanesh