Circuit configuration having a load transistor and a current measuring configuration, method for ascertaining the load current in a load transistor, semiconductor component, and measuring configuration

A method for ascertaining a signal dependent on a load current through a load transistor having a first and a second load path terminal and a control terminal, the method which comprises the steps:

• providing a first current measurement signal by using a first current sensor including a first current measuring transistor having a first and a second load path terminal and a control terminal, the first load path terminal being connected to the load path terminal of the load transistor and the control terminal being connected to the control terminal of the load transistor;
• providing a second current measurement signal by using a second current sensor including a second current measuring transistor having a first and a second load path terminal and a control terminal, the first load path terminal being connected to the load path terminal of the load transistor and the control terminal being connected to the control terminal of the load transistor;
• and
• calculating a current measurement signal dependent on the load current by using the first and second current measurement signals.

In a circuit configuration including a load transistor having a first and a second load path terminal and a control terminal;

• a current measuring configuration for ascertaining a load current through the load transistor, comprising:
• a first current sensor with a first current measuring transistor having a first and a second load path terminal and a control terminal, said first load path terminal being connected to said load path terminal of said load transistor and said control terminal being connected to said control terminal of said load transistor, and said first current sensor providing a first current measurement signal;
• a second current sensor with a second current measuring transistor having a first and a second load path terminal and a control terminal, said first load path terminal being connected to said first load path terminal of said load transistor and said control terminal being connected to said control terminal of said load transistor, and said second current sensor providing a second current measurement signal;
• and
• an evaluation circuit connected to said first and said second current sensor, receiving the first and the second current measurement signals, and providing a current measurement signal depending on the load current.