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
Picture information coding device and coding method
Structural plasticity in spiking neural networks with symmetric dual of an electronic neuron
Digital broadcast receiver and method for processing caption thereof
Image processing apparatus, image processing system, and image processing method
Stack and folding-typed electrode assembly and method for preparation of the same
System for presenting media services
Imaging device, method and computer readable medium
  Randomly Featured Patents
Evaporative cooling system
Turbine engine assembly with aft mounted outlet guide vanes
Methods and apparatus for treatment of patent foramen ovale
Image communication system
Systems and methods for attenuation of noise and wakes produced by aircraft
Dietary supplement containing herbal extracts which promotes healthy hair growth on the scalp
Thin film solar cell and its fabrication process
Computer assisted detection of lesions in volumetric medical images
System and method of recognizing an acoustic environment to adapt a set of based recognition models to the current acoustic environment for subsequent speech recognition
Hand dryer