Describe resistor thermal noise, MOSFET thermal noise, and flicker noise briefly. For a 100-μm / 2-μm MOS device with a transconductance of 20 mAV, the 1/f noise corner frequency i... Describe resistor thermal noise, MOSFET thermal noise, and flicker noise briefly. For a 100-μm / 2-μm MOS device with a transconductance of 20 mAV, the 1/f noise corner frequency is 800 kHz. If k = 3.84 fF/μm², evaluate the oxide thickness.
Understand the Problem
The question is asking to describe different types of noise in electronic components, particularly resistors and MOSFETs, and to evaluate the oxide thickness given certain parameters related to flicker noise in a specified MOS device.
Answer
Oxide thickness is 200 nm.
To find the oxide thickness, use the equation f_c = k * t_ox * V_eff. Solve for t_ox:
Answer for screen readers
To find the oxide thickness, use the equation f_c = k * t_ox * V_eff. Solve for t_ox:
More Information
Thermal noise is generated by the random motion of electrons. Flicker noise, or 1/f noise, results from trapping and de-trapping of charges at the interface.
Tips
Ensure correct usage of noise formulas and units when calculating oxide thickness.
Sources
- Lecture 12: Noise - Texas A&M University - people.engr.tamu.edu
- Noise types in CMOS circuits: Thermal, Flicker and Shot Noise - Miscircuitos - miscircuitos.com
- A Guide to Noise Sources in MOS Transistors - Vik's Newsletter - viksnewsletter.com
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