Integrated circuit test with programmable source for both AC and DC modes of operation

A test system having AC and DC measurement modes of operation, comprising:

• a programmable current source;
• a first switch having first, second, and third switch terminals, wherein the first switch terminal is coupled to the programmable current source;
• a load network having first, second, and third load network terminals, wherein the first load network terminal is coupled to the second switch terminal and the second load network terminal is coupled to the third switch terminal, and wherein the third switch terminal is coupled for transmitting one of an AC or a DC electrical signal;
• and
• a programmable voltage and current source having a force terminal and a sense terminal, the force terminal coupled to the third load network terminal.

A method of delivering an electrical signal to a device under test, comprising the steps of:

• delivering an AC electrical signal to the device under test, comprising the steps of:
• applying a first voltage to a first node of a drive circuit;
• developing a second voltage at a second node of the drive circuit;
• and
• transmitting the second voltage to the device under test;
• and
• delivering a DC electrical signal to the device under test, comprising the steps of:
• applying a third voltage to the first node of the drive circuit;
• and
• transmitting the third voltage to the device under test via the second node.