The JFE2140 features matched-pair, n-type JFET transistors fabricated on a high-precision analog process. Precision matching between opposite JFETs is required in differential-pair configurations, where any mismatch between input devices results in gain and common-mode rejection degradation. Precision matching also minimizes offset voltages that produce excessive error voltages in high-gain, dc-coupled composite amplifiers. Matching distribution for a production lot of units can be seen in Figure 6-10.