There was no problem, so it proceeded to layout design. The first design was reviewed in the summer of 1971. Ĭamenzind also taught circuit design at Northeastern University in the morning, and went to the same university at night to get a master's degree in Business Administration. Among 5xx numbers that were assigned for analogue ICs, the special number "555" was chosen. Other engineers argued the product could be built from existing parts, but the marketing manager bought the idea. Ĭamenzind proposed the development of a universal circuit based on the oscillator for PLLs, and asked that he would develop it alone, borrowing their equipment instead of having his pay cut in half. However, Signetics laid off half of its employees, and the development was frozen due to a recession. He designed an oscillator for PLLs such that the frequency did not depend on the power supply voltage or temperature. He was hired by Signetics to develop a PLL IC in 1968. He became interested in tuners such as a gyrator and a phase-locked loop (PLL). He designed a pulse-width modulation (PWM) amplifier for audio applications, but it was not successful in the market because there was no power transistor included. In 1962, Camenzind joined PR Mallory's Laboratory for Physical Science in Burlington, Massachusetts. Camenzind under contract to Signetics (later acquired by Philips Semiconductors, and now NXP).
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