of note at Fairchild Widlar's tenure at Fairchild was brief but intensely productive. In addition to the groundbreaking designs discussed above, Widlar also put into production the μA710 and μA711 comparators, each exhibiting then-record 40 ns response time. An additional device, the μA726 differential pair, used an on-chip heater with embedded thermostatic control to suppress the effect of ambient temperature on electrical performance. Widlar's productivity was so great that it has stimulated spurious attributions. A prevalent example erroneously credits him with the design of the μA723 voltage regulator. However, not only was that chip released some two years after Widlar's departure from Fairchild, the circuit employs, and relies on, greatly improved lateral PNP transistors that were not available during the period of Widlar's employment at Fairchild. Credit for the μA723 properly belongs to Darryl Lieux, according to his contemporary (and father of the 741), Dave Fullagar. National Semiconductor (1965–1970) Widlar and Talbert realized that the founders of Fairchild did not intend to share their windfall profits with the designers. In November 1965 the two engineers accepted Peter Sprague's offer to join National Semiconductor's Molectro facility in Santa Clara. Widlar received an immediate stock option of 20,000 shares, each valued at five dollars then. He refused to fill an exit interview form for Fairchild and wrote only one line (exact quote): "I want to be RICH!" He told Hulme that the only thing that could keep him with Fairchild was "One million tax free by whatever way you choose". For unknown reasons, Robert Noyce, one of Fairchild's founders, continued to pay Widlar his salary until April 1966. According to Widlar, "Maybe they did not believe that I was actually leaving. Some people are really a little slow." Gifford said that Widlar and Talbert were actually the founders of National Semiconductor, and that Sporck joined them later. The duo started by setting up the epitaxial process at Santa Clara. Once the technology was in place, Widlar concentrated on voltage regulators and by the end of 1966 produced the industry's first integrated linear regulator. The LM100, a revolutionary new circuit, became another flagship product that surpassed expectations for sales and longevity. In 1967 Widlar designed the LM101, an operational amplifier with improved gain, decreased input current, and protection against short circuit. The LM101 featured another unorthodox input stage, employing NPN input transistors emitter coupled to PNP transistors in a common base arrangement. The