Patent ID: 7787838

Claim:
A monolithic substrate containing an integrated circuit, the integrated circuit comprising an amplifier, a mixer and at least a first pad, the amplifier having an input for receiving a signal to be amplified, and an output for outputting the amplified signal, the amplifier and mixer being configurable during manufacture of the integrated circuit to function in a first mode in which the first pad is connected to the input of the amplifier, and a second mode in which the first pad is connected to the output of the amplifier, both the input and the output of the amplifier being accessible during manufacture of the integrated circuit for connection to the first pad, the first pad comprising a discrete region of electrically conductive material coupled to the mixer and having a sufficient surface area for contact with a test probe, said first pad being separated from said input and said output and formed within the boundary of the area of a die for containing said integrated circuit and for enabling, in the manufacture of said integrated circuit, said mixer to be selectively connected either to said input or to said output by fabricating a subsequent connection from said first pad to one of said input and said output, and an electrically conductive member forming said subsequent connection and extending from said input or said output and secured to said first pad.