Patent ID: 6724205
Filing Date: 2004-04-20
Classification: G01R

Abstract:
A probing apparatus for measuring the performance of a device under test, said probing apparatus comprising:(a) a source of a signal, said signal including a modulation signal component and a direct current component; (b) a first bias tee connected to said source of said signal, said first bias tee including a direct current port transmitting said direct current component of said signal and a modulation signal port transmitting said modulation signal component of said signal; (c) an impedance matching resistor, said impedance matching resistor having a first port conductively connected to said modulation signal port of said first bias tee to receive said modulation signal component and a second port; (d) a signal contact tip arranged for selective engagement with a signal contact pad of said device-under-test, said signal contact tip being conductively connected to said second port of said impedance matching resistor; (e) a second bias tee including a direct current port conductively connected to said direct current port of said first bias tee to receive said direct current component of said signal, a modulation signal port, and a combined signal port conductively connected to said signal contact tip; and (f) a termination resistor conductively connected to said modulation signal port of said second bias tee and terminating a signal path for said modulation signal component.