A voltage level shifter for a semiconductor memory device includes a VPP level control circuit that is configured to detect a VPP voltage and to change the VPP voltage in response to a package burn-in mode signal and a test mode signal independent of at least one direct current voltage generated in response to the package burn-in mode signal. In air configuration the craft includes two laterally symmetrically flight surfaces; a smaller forward canard wing, generally horizontally disposed and a larger rearward main wing generally horizontally disposed with fin surfaces, generally vertically disposed, at each tip. The methods include a signal expansion type algorithm that is used to process the pulse-compressed return signal. A projecting portion of the shift shaft and an output shaft of an actuator are connected together on the outside of the crankcase with a connecting device. The system further includes a biasing element for biasing each heater away from the first frame member. The articulating arm mechanism has six major components: a mounting bracket, a mounting bracket support in combination with a swivel bracket, a shelf bracket, an upper arm, at least one side arm, and at least one stopping surface.