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CMOS Power Consumption and Cpd Calculation

April 22, 2016 Leave a comment

Screen Shot 2016-04-22 at 4.02.29 PM

Reduction of power consumption makes a device more reliable. The need for devices that consume a minimum amount of power was a major driving force behind the development of CMOS technologies. As a result, CMOS devices are best known for low power consumption. However, for minimizing the power requirements of a board or a system, simply knowing that CMOS devices may use less power than equivalent devices from other technologies does not help much. It is important to know not only how to calculate power consumption, but also to understand how factors such as input voltage level, input rise time, power-dissipation capacitance, and output loading affect the power consumption of a device. This application report addresses the different types of power consumption in a CMOS logic circuit, focusing on calculation of power-dissipation capacitance (Cpd), and, finally, the determination of total power consumption in a CMOS device.

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Categories: Others, Power

Slew rate

March 14, 2013 Leave a comment

Handwriting note…

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Categories: 1.ANALOG, Others

Low voltage analog circuit design technique

March 10, 2013 Leave a comment
Categories: 1.ANALOG, Others

CMOS Analog Integrated Circuit Design

October 10, 2012 Leave a comment
Categories: 1.ANALOG, Others

Common-Mode Feedback

April 22, 2010 Leave a comment

Why do we need to use Common-Mode Feedback Circuits ?

• In the past, circuits have mainly one input and one output and both

referred to ground.

• Low voltage power supply make single ended circuits very difficult

to perform optimally. An alternative to single-ended circuits is to

use fully differential circuits.

• To double the output swing a fully differential circuit are used.

• The output terminals of fully differential circuits are equal and

opposite polarity.

• Additional properties of fully differential circuits are: improved

output swing, linearity and common-mode rejection ratio.

• How are the differential outputs referred to ?

• How are the common-mode signals eliminated in a Fully differential

circuit ?

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Categories: 1.ANALOG, Others

Active Load

April 22, 2010 Leave a comment

Using an active load, i.e., MOSFET(s), to replace a passive load resistor can dramatically reduced the required chip area for the circuit while also helping produce much higher gains (due to the potentially high small-signal resistance an active load can provide)…

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Categories: 1.ANALOG, Others

Slew Rate

April 21, 2010 Leave a comment

Signal must go somewhere to be useful …

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Categories: 1.ANALOG, Others