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
Electronic package with fluid flow barriers
Cellulose derivative and hydrogel thereof
Non-volatile semiconductor memory and data processing method in non-volatile semiconductor memory
Systems and methods for documenting medical findings of a physical examination
Method and composition for attracting arthropods by volatizing an acid
Device and method for unified codes
System and method for managing investment funds
  Randomly Featured Patents
System and method for DEN/LDAP client database access with a backoff capability
Clamping arrangement
Self-configuring distributed switch
Bicycle carrier for attachment to vehicle
Apparatus and method for single pass BLOB analysis of high frame rate video
Magnetic resonance imaging method and apparatus
Microwave resonant cavity applicator for heating articles of indefinite length
Methods of incorporating nitrogen into silicon-oxide-containing layers
Management of resource identifiers