Patent ID: 11946958
Assignee: STMICROELECTRONICS S.R.L.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 2:
3. The circuit of claim 1, further comprising:
first switching circuitry configured, when conductive, to couple the shunt resistor between the first sensing node and the second sensing node;
second switching circuitry configured, when conductive, to couple the replica resistor between the first sensing node and the second sensing node;
third switching circuitry configured, when conductive, to couple the first end and the second end of the replica resistor to the input node and to the current generator, respectively, wherein the replica resistor is traversed by the reference current flowing therethrough in the first direction; and
fourth switching circuitry configured, when conductive, to couple the second end and the first end of the replica resistor to the input node and to the current generator, respectively, wherein the replica resistor is traversed by the reference current flowing therethrough in the second direction, opposite the first direction; and
switching control circuitry configured to control the first, second, third and fourth switching circuitry:
in the first mode, wherein the second switching circuitry is made conductive to couple the replica resistor between the first sensing node and the second sensing node of the gain circuitry, and the third switching circuitry and the fourth switching circuitry are alternately made conductive, wherein the output signal from the gain circuitry assumes the first value in response to the third switching circuitry being made conductive and the second value in response to the fourth switching circuitry being made conductive, respectively, and
in the second mode, wherein the first switching circuitry is made conductive to couple the shunt resistor between the first sensing node and the second sensing node of the gain circuitry, and the output signal from the gain circuitry assumes the third value.