An electrosurgical system comprising: an electrosurgical instrument including at least one active electrode; and an electrosurgical generator including: an RF output stage adapted to generate electrosurgical energy and to supply said energy to said at least one active electrode; a first DC blocking capacitor electrically coupled between the RF output stage and the at least one active electrode; a second DC blocking capacitor providing DC blocking of return electrosurgical energy; a first plurality of capacitors (36,37,38,39; 36a,37a,38a,39a) arranged in an H-configuration electrically coupled to the first DC blocking capacitor; a first measuring circuit (30; 40; 40a) coupled to the first plurality of capacitors; a second plurality of capacitors (36,37,38,39; 36a,37a,38a,39a) arranged in an H-configuration electrically coupled to the second DC blocking capacitor; a second measuring circuit (32;40;40a) coupled to the second plurality of capacitors; and wherein each said plurality of capacitors includes a first capacitor (36; 36a), a second capacitor (38; 38a), a third capacitor (37; 37a), and a fourth capacitor (39; 39a), wherein the first capacitor (36; 36a) has a first node coupled to a first node of the respective DC blocking capacitor, wherein the second capacitor (38; 38a) has a first node coupled between a second node of the first capacitor (36; 36a) and a reference, wherein the third capacitor (37; 37a) has a first node coupled to a second node of the respective DC blocking capacitor, wherein the fourth capacitor (39; 39a) has a first node coupled between a second node of the third capacitor (37; 37a) and the reference, and wherein the respective measuring circuit (30;32;40;40a) is coupled to the second node of the first capacitor (36; 36a) and the second node of the third capacitor (37; 37a) to determine a respective voltage therebetween; and a sensor circuit configured to determine the current of the electrosurgical energy supplied to the active electrode as a function of the voltage determined by the first measuring circuit (30;40;40a); and to determine the return current as a function of the voltage determined by the second measuring circuit (32;40,40a). an electrosurgical instrument including at least one active electrode; and an electrosurgical generator including: an RF output stage adapted to generate electrosurgical energy and to supply said energy to said at least one active electrode; a first DC blocking capacitor electrically coupled between the RF output stage and the at least one active electrode; a second DC blocking capacitor providing DC blocking of return electrosurgical energy; a first plurality of capacitors (36,37,38,39; 36a,37a,38a,39a) arranged in an H-configuration electrically coupled to the first DC blocking capacitor; a first measuring circuit (30; 40; 40a) coupled to the first plurality of capacitors; a second plurality of capacitors (36,37,38,39; 36a,37a,38a,39a) arranged in an H-configuration electrically coupled to the second DC blocking capacitor; a second measuring circuit (32;40;40a) coupled to the second plurality of capacitors; and an RF output stage adapted to generate electrosurgical energy and to supply said energy to said at least one active electrode; a first DC blocking capacitor electrically coupled between the RF output stage and the at least one active electrode; a second DC blocking capacitor providing DC blocking of return electrosurgical energy; a first plurality of capacitors (36,37,38,39; 36a,37a,38a,39a) arranged in an H-configuration electrically coupled to the first DC blocking capacitor; a first measuring circuit (30; 40; 40a) coupled to the first plurality of capacitors; a second plurality of capacitors (36,37,38,39; 36a,37a,38a,39a) arranged in an H-configuration electrically coupled to the second DC blocking capacitor; a second measuring circuit (32;40;40a) coupled to the second plurality of capacitors; and wherein each said plurality of capacitors includes a first capacitor (36; 36a), a second capacitor (38; 38a), a third capacitor (37; 37a), and a fourth capacitor (39; 39a), wherein the first capacitor (36; 36a) has a first node coupled to a first node of the respective DC blocking capacitor, wherein the second capacitor (38; 38a) has a first node coupled between a second node of the first capacitor (36; 36a) and a reference, wherein the third capacitor (37; 37a) has a first node coupled to a second node of the respective DC blocking capacitor, wherein the fourth capacitor (39; 39a) has a first node coupled between a second node of the third capacitor (37; 37a) and the reference, and wherein the respective measuring circuit (30;32;40;40a) is coupled to the second node of the first capacitor (36; 36a) and the second node of the third capacitor (37; 37a) to determine a respective voltage therebetween; and a sensor circuit configured to determine the current of the electrosurgical energy supplied to the active electrode as a function of the voltage determined by the first measuring circuit (30;40;40a); and to determine the return current as a function of the voltage determined by the second measuring circuit (32;40,40a).