Patent ID: 8237427

Claim:
A bridge module for providing connection between a test instrument and a line under test, the line under test having a first conductor and a second conductor, the bridge module comprising: a first high impedance resistor in communication with the first conductor; a second high impedance resistor in communication with the second conductor; a first input switch in communication with said first conductor; a second input switch in communication with said second conductor; a first coupling capacitor in communication with said first high impedance resistor and said first input switch; a second coupling capacitor in communication with said second high impedance resistor and said second input switch; a receiver to amplify the signals received from said first and second capacitors; wherein when said first and second switches are in an off state, a charging path is provided by said first and second high impedance resistors and said first and second capacitors to charge said first and second capacitors; and wherein when said first and second switches are in an on state, a signal path is provided from said line under test to said test instrument by said first and second switches, said first and second capacitors and said receiver.