Resources Contact Us Home
Method for simulating a controlled voltage for testing circuits for electromagnetic susceptibility

Image Number 11 for United States Patent #5689192.

Apparatus and method for low cost monitoring the level of signal at a test point in a system for susceptibility to electromagnetic fields. A probe, including a detector diode, and a non-metallic, electrically overdamped conductor, which is transparent to the electromagnetic field, is used to monitor the signal level at a test point as an amplitude modulated radio frequency carrier. The carrier is transmitted to a monitor outside of the range of the electromagnetic field using a transmission link, such as an optical waveguide transmitter, that is transparent to the electromagnetic field when the system under test fails. The system under test can then be removed from the electromagnetic field and, for each frequency at which the system failed, a voltage can be injected, using a voltage injection probe, into the system at another point to recreate the detected level of signal at the test point that was coupled into the system from the electromagnetic field. This simulates the effect of the susceptibility to the electromagnetic field, and permits testing of a suitable filter or other expedient applied to the system, even though the system is not exposed to the electromagnetic field. Thus, the system may be tested for susceptibility inside a shielded enclosure and subjected to a controlled electromagnetic field, and the susceptibility may be recreated and solved outside of the shielded enclosure. The probe may include a plurality of detector diodes mounted on a printed circuit board in a shielded structure that is directly connected to the test wire of the circuit to be monitored.

  Recently Added Patents
Method and arrangement for SINR feedback in MIMO based wireless communication systems
File system and method of file access
Lens system and image pickup system including the same
Parallel restricted integrated sign on system and method
Ultrasonic diagnosis apparatus and ultrasonic diagnosis method
Splitter wall plates for digital subscriber line (DSL) communication systems and methods to use the same
Planter support rail
  Randomly Featured Patents
Exposure balance arrangement for an image fixing device
Elevator brake
Package elements and methods for securing a getter
Device for introducing a catheter with a security non-piercing cage provided with a flexible blade
Method and system for controlled combustion engines
Circuit for correcting output phase of rotary encoder
Scalable spectrum CDMA communication systems and methods with dynamic orthogonal code allocation
Ring shank
Flow sensing apparatus used to monitor/provide feedback to a split flow pumping system
Apparatus and method for controlling fuel injection of internal combustion engine, and internal combustion engine