Patent ID: 8125238
Filing Date: 2012-02-28
Classification: G01R

Abstract:
1. A coupling line for coupling a signal generator to a device under test, the coupling line comprising: a first Zener diode; a second Zener diode, wherein the first Zener diode and the second Zener diode are coupled in an anti-serial manner and are adapted to pass a signal from the signal generator to the device under test when the signal generator is active and to prevent a signal generated in the device under test from propagating to the signal generator when the signal generator is inactive; a capacitor coupled in parallel with the first and second Zener diodes, wherein a capacitance value of the capacitor is set so as to achieve a predetermined admittance for a predetermined oscillation frequency of a test signal, such that the capacitance value is equal to the predetermined admittance divided by 2 times pi times the predetermined oscillation frequency.