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
Synchronization processing circuit and synchronization processing method in wireless communication system
Flexible quantization
Solid-state imaging apparatus, method of manufacturing solid-state imaging apparatus, and electronic apparatus
Communication system
Communication system and time synchronization method
Semiconductor device and method of forming interconnect structure with conductive pads having expanded interconnect surface area for enhanced interconnection properties
Drinking glass with ball embedded in base
  Randomly Featured Patents
System and method for downhole communication
Variable phase-shifting rf power amplifiers
Line radiator ribbon loudspeaker
Bicycle hub
Service providing system, management terminal, mobile member, service providing program, and service providing method
Window casing installation tool
Load shoring beam for cargo trucks
Device and method for investigating the flowability of a physiological fluid sample
Process for producing controlled drug-release contact lens, and controlled drug-release contact lens thereby produced
Vehicle ceiling structure