Metric sizes of insulated round winding wires

By -

Metric sizes of insulated round winding wires

image

image

Comments

Post a Comment

Popular posts from this blog

Dynamic Random Access Memory:DRAM Memory Cell

By -
Image
DRAM Memory Cell In early CMOS DRAM storage cell design, three-transistor and four-transistor cells were used in 1-Kb and 4-Kb generations. Later, a particular one-transistor cell, as shown in Figure 55.4(a), became the industry standard [5,6]. The one-transistor (1T) cell achieves smaller cell size and low cost. The cell consists of an n-channel MOSFET and a storage capacitor C s. The charge is stored in the capacitor C s and the n-channel MOSFET functions as the access transistor. The gate of the n-channel MOSFET is connected to the word-line WL and its source/drain is connected to the bit-line. The bit-line has a capacity C BL , including the parasitic load of the connected circuits. The DRAM cell stores one bit of information as the charge on the cell storage capacitor C s. Typical values for the storage capacitor C s are 30 to 50 fF. When the cell stores “1”, the capacitor is charged to V DD – V t. When the stores “0”, the capacitor is discharged to 0 V. During the READ ...
Read more

CMOS/BiCMOS Technology:BiCMOS Technology.

By -
Image
BiCMOS Technology Development of BiCMOS technology began in the early 1980s. In general, bipolar devices are attractive because of their high speed, better gain, better driving capability, and low wide-band noise properties that allow high-quality analog performance. CMOS is particularly attractive for digital applications because of its low power and high packing density. Thus the combination would not only lead to the replacement and improvement of existing ICs but would also provide access to completely new circuits. Figure 2.25 shows a typical BiCMOS structure [112]. Generally, BiCMOS has vertical npn bipolar junction transistor, lateral pnp transistor, and CMOS on the same chip. Furthermore, if additional mask steps are allowed, passive devices are integrated, as described in the previous section. The main feature of the BiCMOS structure is the existence of a buried layer because bipolar processes require an epitaxial layer grown on a heavily doped n+ subcollector to reduce co...
Read more

HISTORY OF THE PROFESSION

By -
HISTORY OF THE PROFESSION During the past two decades, the electronics industry has grown very fast both in size and in complexity. Designers began talking about chip design only 25 years ago. At the beginning, the idea was to design chips to reduce the computer size. Instead of room-sized computers, we have now ended up with PCs running at a speed that back then was considered “impossible to imagine.” The application of IC technology has exploded into many parts of our lives. IC layout design was originally hand-drafted on special paper called Mylar. This was a long and laborious task. The market demands and advances in technology brought about an immediate need to develop software and hardware solutions to improve the time-to-market of the chip designs and especially to automate the entire process. Accuracy of the final masks was also a driving force in the computerization of layout design. The first platforms were custom built to ensure that graphics applications ran quickly and...
Read more