A driver circuit includes a circuit 200, a transistor 101\u20141, and a transistor 101\u20142. The rotary transfer device receives slugs from the extruder and the slug conveyor linearly conveys individual slugs from the transfer device. The cathode can be formed of a material that corrodes little. The correlations are combined according to the weighting factors to estimate information encoded in the transmitted spread spectrum signal. Key to the operation of the invention is the ability to observe operation of the Webpage as it actually loads in real time, scoring the page for several of various performance factors, and producing a combined score for the various factors. In use, a fluid sample is loaded into the microfluidic cell and the fluid is analyzed via magnetic resonance using the quantum spin defects.