SME
College · Engineering
Electronics
4 topics
Electrical
Before this course
Topics
Diodes
Main lesson
Shockley’s diode equation
Use this for “A diode with IS = 10⁻¹⁴ A and n = 1 has 0.65 V across it. Find the current.”
Zener regulator
Use this for “A 5.1 V zener regulates 12 V for a 20 mA load, keeping 5 mA in the zener. Find R.”
Bridge rectifier with a filter capacitor
Use this for “A bridge rectifier on a 12 V peak secondary feeds 470 μF and 1 kΩ. Find the ripple and the dc output.”
BJTs and MOSFETs
Main lesson
Current gain: IC, IE and α from β
Use this for “A BJT with β = 100 has a base current of 20 μA. Find IC, IE and α.”
MOSFET drain current in saturation
Use this for “An n-channel MOSFET has kₙ = 2 mA/V², Vₜ = 1 V and VGS = 3 V. Find ID in saturation.”
MOSFET drain current in triode
Use this for “An n-channel MOSFET has kₙ = 2 mA/V², Vₜ = 1 V, VGS = 3 V and VDS = 0.5 V. Find ID.”
MOSFET regions: cutoff, triode or saturation
Use this for “An n-channel MOSFET with Vₜ = 1 V has VGS = 3 V and VDS = 0.5 V. Which region is it in?”
Amplifiers
Main lesson
Common-source MOSFET amplifier
Use this for “A MOSFET biased at ID = 0.5 mA with 0.25 V of overdrive drives RD = 10 kΩ. Find gₘ and the gain.”
Gain with source resistance
Use this for “An amplifier with Aᵥ = −60 and Rᵢₙ = 5 kΩ is driven from a 1 kΩ source. Find the overall gain.”
Cascaded stages in decibels
Use this for “Two stages with voltage gains of 20 and 50 are cascaded. Find the overall gain, as a ratio and in dB.”
Op-amp circuits
Main lesson
Integrator output ramp
Use this for “An integrator has R = 10 kΩ and C = 1 μF. Find vₒᵤₜ 4 ms after 0.5 V is applied.”
Active low-pass filter
Use this for “An inverting low-pass has R₁ = 10 kΩ, Rf = 100 kΩ and C = 1.59 nF. Find its gain and cutoff.”
Schmitt-trigger thresholds
Use this for “An inverting Schmitt trigger has ±12 V rails, R₁ = 10 kΩ and R₂ = 50 kΩ. Find its thresholds.”
Course test
See what you know: 10 questions on this course
New questions each time. Pass to mark it complete.