What are stick diagrams?
stick diagrams are a means of capturing topography and layer information using simple diagrams. Stick diagrams convey layer information through colour codes (or monochrome encoding). Acts as an interface between symbolic circuit and the actual layout.
What is stick diagram and layout?
Stick Diagram. A stick diagram is a graphical view of a layout or. cartoon of a chip layout.
What is stick diagram state the layout design rules?
13.4 Stick Diagrams Another popular method of symbolic design is “Sticks” layout. In this, the designer draws a freehand sketch of a layout, using colored lines to represent the various process layers such as diffusion, metal and polysilicon .
What is stick diagram and list the rules for drawing stick diagrams?
The stick diagrams uses “sticks” or lines to represent the devices and conductors. 1) Power and ground lines run horizontally in metal 1. 2) The input and output are accessible from the top or bottom of the cell and will be in Metal 2 running vertically.
What is Lambda rule?
1. Layout DesignRules The physicalmask layout of any circuit to be manufactured using a particular process mustconformto a set of geometric constraints or rules, which are generally called layoutdesign rules.
Which Colour is used for contact areas in stick diagram?
Solution: Black color is used to represent contact areas. This is the part where two different touch or cross each other.
What is layout diagram?
A drawing meant to depict the physical arrangement of the wires and the components they connect is called artwork or layout, physical design, or wiring diagram. Circuit diagrams are used for the design (circuit design), construction (such as PCB layout), and maintenance of electrical and electronic equipment.
Which Colour coding used in stick diagram for metal?
Stick Diagram Colour Code Red Polysilicon Green N diffusion Yellow / Brown P diffusion Blue M1 Purple (Magenta) M2.
How do you create a digital diagram?
8 Online Tools to Draw Diagrams and Flowcharts Lucidchart. Lucidchart allows you to create diagrams and flowcharts without installing any software easily. Draw.io. Draw.io is a completely free online tool for creating diagrams of all types. Cacoo. Gliffy. Sketchboard. Creately. DrawAnywhere. Google Drawings.
What are layout design rules?
Layout design rules are introduced in order to create reliable and functional circuits on a small area. Main terms in design rules are feature size (width), separation and overlap. Design rules does represent geometric limitations for for an engineer to create correct topology and geometry of the design.
What is a scale plan?
Plans are usually “scale drawings”, meaning that the plans are drawn at a specific ratio relative to the actual size of the place or object. Various scales may be used for different drawings in a set.
What is micron rule?
Micron rules: List of minimum feature sizes and spacings for all masks, e.g., 3.25 microns for contact-poly-contact (transistor pitch) and 2.75 micron metal 1 contact-to-contact pitch. Micron rules can result in as much as a 50% size reduction over lambda rules. Normal style for industry.
What causes latch up?
A common cause of latch-up is a positive or negative voltage spike on an input or output pin of a digital chip that exceeds the rail voltage by more than a diode drop. Another cause is the supply voltage exceeding the absolute maximum rating, often from a transient spike in the power supply.
What is NMOS inverter?
NMOS Inverter. • For any IC technology used in digital circuit design, the basic circuit element is the logic inverter. • Once the operation and characterization of an inverter circuits are thoroughly understood, the results can be extended to the design of the logic gates and other more complex circuits.
What is CMOS NOR gate?
CMOS Logic Circuits: CMOS NOR2 (Two-Input NOR) Gate: The output voltage of the CMOS NOR2 gate will attain a logic-low voltage of VOL= 0 and a logic- high voltage of VR = VDD. For circuit design purposes, the switching threshold voltage Vth of the CMOS gate emerges as an important design criterion.
Which type of contact cuts are better?
Which type of contact cuts are better? Solution: Buried contacts are much better than butted contacts. In butted contacts the two layers are joined together or binded together using adhesive type of material where as in buried contact one layer is interconcted or fitted into another.
What is CMOS and NMOS?
CMOS stands for Complementary Metal-Oxide-Semiconductor whereas NMOS is a negative channel metal oxide semiconductor. CMOS and NMOS are two logic families, where CMOS uses both MOS transistors and PMOS for design and NMOS use only field-effect transistors for design.
What are CMOS design rules?
Cmos design rule CMOS DESIGN RULES • The physical mask layout of any circuit to be manufactured using a particular process. Design rules which determine the dimensions of a minimumsize transistor. Design rules which determine the separation between the nMOS and the pMOS transistor of the CMOS inverter.
What is VLSI design flow?
The VLSI design flow can be divided into two parts: Frontend design flow and Backend design flow. Both together, allow the creation of a functional chip from scratch to production. The frontend flow will be briefly described, while the backend flow is further analyzed.
Which model is used for scaling?
Which model is used for scaling? Explanation: Constant electric scaling model and constant voltage scaling model is used for scaling. Explanation: α is used as the scaling factor for linear dimensions where as β is used for supply voltage Vdd, gate oxide thickness etc.
What should be the width of metal1 and metal2 layer?
Explanation: The width of the metal 1 layer should be 3λ and metal 2 should be 4λ. Explanation: Implant for a n-mos depletion mode transistor should extend minimum of 2λ from the channel in all the directions.
What are the 4 basic layout types?
There are four basic layout types: process, product, hybrid, and fixed position.
How do you create a circuit diagram in Word?
How to draw circuit diagrams in Word? Step1: Download AxGlyph and Install it with a Word Add-in. AxGlyph is a multipurpose vector graph maker. Step2: Open Word and Navigate to the AxGlyph Ribbon Bar. After a successful installation, the Word add-in will appears on the ribbon bar. Step3: Draw the Circuit Diagram.
What information can be and Cannot be extracted from stick diagrams?
Explanation: Stick diagram does not show exact placement of components, transistor length, wire length and width, tub boundaries, etc.
What is Design Rule VLSI?
In electronics engineering, a design rule is a geometric constraint imposed on circuit board, semiconductor device, and integrated circuit (IC) designers to ensure their designs function properly, reliably, and can be produced with acceptable yield.