Original Publication Date: 1984-May-01
Included in the Prior Art Database: 2005-Feb-04
A programmable tri-functional circuit serves as a bidirectional interface between the voltage and frequency domains of very small signal, very high speed, advanced VLSI circuits, such as Josephson junction circuits (which operate at temperatures near absolute zero) and room temperature circuits implemented in semiconductor technology. The bidirectional interface is a programmable tri-functional circuit. It can be configured (receive mode) as a low level high frequency receiver. It can also be a passive driver (drive mode) which is driven from conventional drive circuitry. The third mode (sense-while-drive- mode) is a simultaneous receive and drive function. It allows a parametric resistance measurement which can be useful for low level, high frequency device port characterization or contact verification testing.