Patent ID: 9693417
Date: 2017-06-27
CPC Classifications: G01R,H05B

Claim:
1. A measurement circuit configured to provide a sensed input voltage indicative of an input voltage, wherein the measurement circuit comprises a first resistor which is configured to be coupled at a first side to the input voltage; current mirror circuitry coupled at an input to a second side of the first resistor, which is opposite to the first side of the first resistor, and configured to translate an input current at the input of the current mirror circuitry into an output current at an output of the current mirror circuitry, such that the output current is proportional to the input current by a current mirror ratio; a second resistor coupled to the output of the current mirror circuitry and configured to provide the sensed input voltage, when the input voltage is coupled to the first side of the first resistor; and a source follower circuit arranged between the second side of the first resistor and the input of the current mirror circuitry; wherein the source follower circuit is configured to set a voltage level of the second side of the first resistor to a pre-determined reference voltage.