Resources Contact Us Home
Wide dynamic range detection circuit

Image Number 5 for United States Patent #5424674.

Two wide dynamic range detection circuits are disclosed, which are capable of detecting low-level desired signals in the presence of nearby strong interfering signals. Each circuit includes an attenuator scheme for attenuating the interfering signal while passing the desired signal. The first attenuator scheme uses a YIG filter in combination with an automatic gate arrangement. The second attenuator scheme uses a two-channel arrangement. The first channel uses a chirp-Z processor to derive a pulse-type transform signal in response to the strong interference signal. The second channel includes a YIG filter followed by a programmable notch filter which is controlled by the interference-signal pulse from the first channel. Following the programmable notch filter in the second channel is a chirp-Z processor followed by a gate arrangement wherein the gates are switched "OFF" under control of the interference-signal pulse from the first channel.

  Recently Added Patents
Automated gate system
Architectural panel with bamboo rings heavy density embossed surface
Portable hand-held multi-function device for storing, managing and combining rewards
Pixel structure of organic light emitting device
Method of forming a power supply controller and structure therefor
Method of estimating remaining constant current/constant voltage charging time
Clostridium chauvoei polypeptide, DNA encoding the polypeptide and a vaccine comprising the polypeptide
  Randomly Featured Patents
System and method for coding and/or decoding image adaptive split region of motion picture
Radio frequency receiver, wireless communication unit and method of operation
Pasta gauge and container
Digital carrier synthesis by counting cycles for synchronization to a reference signal that is asynchronous with respect to a digital sampling clock
Spray gun
Method for processing workpieces by ultrasonic energy
Method and apparatus for producing rod-like tobacco fillers
Sample amplitude error detection and correction apparatus and method for use with a low information content signal
Calibration technique for measuring gate resistance of power MOS gate device at wafer level
Method of identifying virtual representations of nucleotide sequences