Is it possible to split a transistor with two fingers?

Is it possible to split a transistor with two fingers?

Splitting transistors can either be done by using multiple transistors with a single gate or with transistors that have multiple gate fingers. Transistors with multiple fingers have the disadvantage that the current direction is different for two neighbouring fingers.

Which is better multiple finger or single finger layout?

1) MF provide more flexibility in layout planning for transistor with high W/L or L/W. In other words, allows making a layout more square-like. 2) MF allow better matching of transistors, when needed. For example, if using common-centroid techniques. 3) MF layout reduces gate resistance (for AC).

Which is the multiplier in layout XL for transistors?

The m is the multiplication factor. In Layout XL, for transistors, the m from the schematic is used to create multiple layout instances with common parameters. i.e. for eg., a schematic instance M0 with total_width=6u, length=1u, fingers=3 finger_width=2u m=5

What are the disadvantages of multiple fingers?

Transistors with multiple fingers have the disadvantage that the current direction is different for two neighbouring fingers. E.g. if for the first finger the source is to the left then the source for the next finger will be to the right. The properties of transistor can change depending on the current direction.

What is the internal structure of an NMOS transistor?

IC design 2.1. Figure 2.1: An internal structure of an nMOS transistor. • Two n+ diffusion regions (’+’ indicates the high degree of doping) form the source and drain of the transistor. The area in between forms a conducting channel. Potentially, electrons, negative carriers, will form the current in the channel.

How are the properties of a transistor changed?

E.g. if for the first finger the source is to the left then the source for the next finger will be to the right. The properties of transistor can change depending on the current direction.