Analog Electronics
A diode conducts one way and a transistor amplifies — but only because of what carriers are doing inside the material. These topics animate the device physics first, then the circuit that depends on it.
Start from the beginning →1 topic you can watch now, 25 still to come.
Semiconductors and the junction
Why a material that is neither conductor nor insulator is the useful one.
- Intrinsic and extrinsic semiconductors
- Drift and diffusion current
- Diode I-V characteristic and models
- Zener breakdown and avalanche
Diode circuits
The first useful thing a one-way device buys you.
- Half-wave and full-wave rectifiers
- Capacitor filtering and ripple
- Clippers and clampers
- Zener voltage regulator
Bipolar junction transistors
Two junctions, one small current controlling a large one.
- BJT operation and regions
- DC biasing and the Q-point
- Small-signal hybrid-pi model
- CE, CB and CC amplifier configurations
Field-effect transistors
Control by voltage rather than current — and the modern default.
- JFET and MOSFET operation
- MOSFET biasing
- Common-source amplifier
- The MOSFET as a switch
Operational amplifiers
A gain block so large you design with feedback instead.
- The ideal op-amp and virtual short
- Inverting and non-inverting amplifiers
- Summing, difference and instrumentation amplifiers
- Integrator, differentiator and comparator
- Active filters
Feedback and oscillators
The same loop that stabilises a gain can make it oscillate.
- Four feedback topologies
- Effect of feedback on gain and bandwidth
- Barkhausen criterion
- RC and LC oscillators