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
Biphotonic photosensitizers, nanoparticles containing the same and their use as drugs
Pear-shaped convertible reading glasses
Systems and methods for classifying electronic information using advanced active learning techniques
Process for improving the hydrolysis of cellulose in high consistency systems using one or more unmixed and mixed hydrolysis reactors
Method for producing a flexible composite elastomeric polyurethane skin
Video reproducing apparatus and video reproducing method
Therapeutic human anti-IL-1R1 monoclonal antibody
  Randomly Featured Patents
Support device replacing the existence or function of a limb
Integrated data and timing circuitry for automatic circuit tester
Apparatus for demagnetizing parts
Combined videophone and mounting arrangement
Zoom lens, imaging device, and camera having imaging device
Locking body, of bolt-type seal lock, having electronics for detecting and wireless communicating cutting of bolt
Motor control device
Gas insulated electromagnetic induction appliance
Method for electrically discharging substrate, substrate processing apparatus and program
Safety harness on/off switch assembly for treadmills