Patent ID: 7202711

Claim:
An integrated driver with improved load current sense capability, comprising: a first transistor having a first terminal, a second terminal and a control terminal, wherein the first terminal of the first transistor is coupled to one side of a load; a first amplifier including a first input, a second input and an output, wherein the first input of the first amplifier is coupled to the first terminal of the first transistor; a second transistor having a first terminal, a second terminal and a control terminal, wherein the control terminal of the second transistor is coupled to the output of the first amplifier, the first terminal of the second transistor is coupled to one side of a power source via a first impedance; a third transistor having a first terminal, a second terminal and a control terminal, wherein the first terminal of the third transistor is coupled to the second terminal of the second transistor and the second input of the first amplifier, and wherein the control terminals of the first and third transistors are coupled together and the first and third transistors conduct responsive to a control signal provided on the control terminals of the first and third transistors; a second amplifier including a first input, a second input and an output, wherein the first input of the second amplifier is coupled to the first terminal of the second transistor; and a fourth transistor including a first terminal, a second terminal and a control terminal, wherein the output of the second amplifier is coupled to the control terminal of the fourth transistor and the second input of the second amplifier is coupled to the second terminal of the fourth transistor, and wherein the second terminal of the fourth transistor is coupled to the one side of the power source via a second impedance and the first terminal of the fourth transistor provides an output current that is indicative of a load current through the load.