Patent ID: 8774365

Claim:
A high voltage sensing circuit, with temperature compensation, for an x-ray source, comprising: a. high voltage sensing resistors comprising: i. a first resistor having a first resistance (R 1 ), a second resistor having a second resistance (R 2 ), a third resistor having a third resistance (R 3 ), and a fourth resistor having a fourth resistance (R 4 ); ii. a first series comprising the first resistor and the second resistor electrically connected in series, the connection between the first resistor and the second resistor called a first connection, and having one end of the first series configured to be electrically connected to a cathode of the x-ray source and another end of the first series configured to be electrically connected to an anode of the x-ray source; iii. a second series comprising the third resistor and the fourth resistor electrically connected in series, the connection between the third resistor and the fourth resistor called a second connection; iv. the first series and the second series electrically connected in parallel; v. the first series comprising a first resistive material that has a first temperature coefficient of resistance, the second series comprising a second resistive material that has a second temperature coefficient of resistance, and the first temperature coefficient of resistance is different from the second temperature coefficient of resistance; and b. a voltage measurement circuit configured to calculate a total voltage (V T ) between the cathode and the anode of the x-ray source by: i. determining a voltage differential across the first resistor, called a first voltage (V 1 ); ii. determining a voltage between the first connection and the second connection, called a differential voltage (V d ); and iii. using the first voltage and the differential voltage to calculate the total voltage.