A solder-joint detection circuit uses a resistive bridge and a
differential detector to detect faults in the solder-joint network both
inside and outside the digital electronic package during operation. The
resistive bridge is preferably coupled to a high supply voltage used to
power the package. Resistors R1 and R2 are connected in series at a first
junction between the high and low supply voltages and a resistor R3 is
coupled to the high supply voltage and connected in series with the
resistance of the solder-network at a second junction. The network is
held at a low voltage on the die. The detector compares the sensitivity
and detection voltages and outputs a Pass/Fail signal for the
solder-joint network.