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For answers
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Floating gate trimming utilizes a CMOS transistor or EPAD (Electrically Programmable Analog Device) with a floating gate of polysilicon embedded in the device gate oxide. In linear components such as op-amps, the EPAD is part of the op-amp chip and adds virtually no additional cost or complexity to manufacture. |
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EPAD is an all solid state technology. This technology eliminates mechanical difficulties inherent in trimmer potentiometer technology. It is simpler, less expensive, easier to use; and in many cases, far more accurate and relaibale than standard trimmer potentiomter or microcontrol circuitry. |
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Silicon
Gate CMOS Linear Technology Historically, MOS technology has been the domain of the digital designer. Analog designers might use MOS transistors for the input stage of a high input impedance operational amplifier or use discrete MOS transistors in a linear circuit, but bipolar technology ruled the linear integrated circuit world. CMOS technology has changed this. The incredible growth of the CMOS market has caused rapid development of CMOS technology which has led to advanced CMOS linear devices. There are a number of factors that will cause the CMOS linear market to continue to grow rapidly and become a very important part of linear technology. The proliferation of digital circuitry (digital displays, digital computers, etc.) in analog applications, the large increase in chip density, demands for smaller integrated circuits, and the rapid increase in demand for accurate, low power devices will lead to a tremendous number of CMOS linear applications. This article discusses silicon gate CMOS technology and the advantages and disadvantages of the CMOS devices in order for the design engineer to fully understand the role ALD products can play in linear design.
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E-Trim™
Technology