Patents by Inventor Wei-Ling Chiang

Wei-Ling Chiang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Automatic gain control system with dual-RSSI interference detection for optimization of sensitivity and adjacent channel rejection performance of RF receivers
    Patent number: 8498600
    Abstract: A tuner includes a low noise amplifier (LNA), a first received signal strength indicator (RSSI), a mixer, an intermediate frequency (IF) filter, a second RSSI and an adjustment unit. The LNA amplifies a radio frequency (RF) signal. The first RSSI detects received signal strength indication of the RF signal and obtains a first signal strength voltage. The mixer is coupled to the LNA and down-converts the RF signal into a first IF signal according to a local oscillation frequency. The IF filter is coupled to the mixer and filters the first IF signal to obtain a second IF signal. The second RSSI detects received signal strength indication of the second IF signal and obtains a second signal strength voltage. The adjustment unit adjusts a gain of the LNA according to the first signal strength voltage and the second signal strength voltage.
    Type: Grant
    Filed: June 14, 2011
    Date of Patent: July 30, 2013
    Assignee: Infomax Communication Co., Ltd.
    Inventors: Chung Kei Thomas Chan, Wei-Ling Chiang
  • AUTOMATIC GAIN CONTROL SYSTEM WITH DUAL-RSSI INTERFERENCE DETECTION FOR OPTIMIZATION OF SENSITIVITY AND ADJACENT CHANNEL REJECTION PERFORMANCE OF RF RECEIVERS
    Publication number: 20120034894
    Abstract: A tuner includes a low noise amplifier (LNA), a first received signal strength indicator (RSSI), a mixer, an intermediate frequency (IF) filter, a second RSSI and an adjustment unit. The LNA amplifies a radio frequency (RF) signal. The first RSSI detects received signal strength indication of the RF signal and obtains a first signal strength voltage. The mixer is coupled to the LNA and down-converts the RF signal into a first IF signal according to a local oscillation frequency. The IF filter is coupled to the mixer and filters the first IF signal to obtain a second IF signal. The second RSSI detects received signal strength indication of the second IF signal and obtains a second signal strength voltage. The adjustment unit adjusts a gain of the LNA according to the first signal strength voltage and the second signal strength voltage.
    Type: Application
    Filed: June 14, 2011
    Publication date: February 9, 2012
    Applicant: MaxRise Inc.
    Inventors: Chung Kei Thomas CHAN, Wei-Ling Chiang