×

Solid state relay

  • US 6,054,891 A
  • Filed: 03/18/1998
  • Issued: 04/25/2000
  • Est. Priority Date: 03/18/1997
  • Status: Expired due to Fees
First Claim
Patent Images

1. A solid state relay comprising:

  • a) at least one power semiconductor including a gate electrode and having two electrodes defining a main path;

    b) at least one current detector coupled to the main path of the power semiconductor and providing a signal which is a function of an absolute value of the current in the main path, wherein the at least one current detector includes a sensor having a ferromagnetic core at least partially surrounding the main path, a coil wound at least partially around the core, an oscillator generating a carrier signal coupled to the sensor and a detection circuit coupled to the sensor; and

    c) an evaluation circuit coupled to the current detector for receiving said signal and producing an output signal coupled to said gate electrode of said power semiconductor.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×