Contents

1 Introduction
2 Semiconductor physics
3 Biasing
Exercise 3.1 Biasing a circuit with an NPN
Exercise 3.2 Biasing a circuit with two cascaded NPNs
Exercise 3.3 Biasing a crappy FM transmitter circuit
Exercise 3.4 Biasing a clap switch circuit
Exercise 3.5 Biasing an amplifier with an NMOS transistor
Exercise 3.6 Biasing in a door alarm circuit
Exercise 3.7 Biasing a circuit with an NMOS transistor
Exercise 3.8 Biasing an amplifier circuit with an NMOS transistor
Exercise 3.9 Biasing an amplifier with an NPN
Exercise 3.10 Bias issues within an antenna amplifier
Exercise 3.11 Biasing in a radio receiver circuit
Exercise 3.12 Biasing in a metal detector circuit
Exercise 3.13 Biasing in an FM transmitter circuit
4 Small signal equivalent circuits
Exercise 4.1 Signal sources, loads and overall gain
Exercise 4.2 An NMOS amplifier circuit
Exercise 4.3 Rubbish from internet - find an error
Exercise 4.4 An NPN amplifier and its PNP equivalent
Exercise 4.5 AN NMOS amplifier circuit
Exercise 4.6 An amplfier with a single NPN
Exercise 4.7 An NPN amplifier and bandwidth issues
Exercise 4.8 An NMOS amplifier with weird biasing
Exercise 4.9 A degenerated NMOS amplifier
Exercise 4.10 Basic amplifiers with an NPN and an NMOS transistor
Exercise 4.11 A triode vacuum tube
Exercise 4.12 A pentode vacuum tube
Exercise 4.13 A PNP
5 Small-signal equivalent circuits - amplifiers
Exercise 5.1 An amplifier with 2 outputs
Exercise 5.2 A weird degenerated amplifier with an NPN
Exercise 5.3 A common-collector amplifier
Exercise 5.4 A common gate amplifier
Exercise 5.5 A common-base and a common emitter amplifier
Exercise 5.6 A common-gate amplifier and a something else
Exercise 5.7 An amplfier using a single NPN
Exercise 5.8 An amplifier with 2 NPNs
Exercise 5.9 An NPN amplifier driven from a voltage source
Exercise 5.10 An NPN amplifier driven from a current source
Exercise 5.11 An NPN amplifier
6 Feedback
Exercise 6.1 Opamp configurations with reactive components
Exercise 6.2 A voltage source circuit including an opamp
Exercise 6.3 An opamp configuration with feedback to both inputs
Exercise 6.4 A circuit with an opamp
Exercise 6.5 What about slew rate?
Exercise 6.6 Feedback wrapped around an NPN - limiting factors
Exercise 6.7 Does this filter something?
Exercise 6.8 A transimpedance amplifier
Exercise 6.9 Opamp configuration with series impedance in the loop
Exercise 6.10 Frequency dependencies in a unity gain configuration
Exercise 6.11 Non linear feedback around an opamp configuration
Exercise 6.12 A Sallen-Key low-pass filter circuit
Exercise 6.13 Apparently a swcond order filter...
7 The opamp and stability
Exercise 7.1 Stability for a trans impedance amplifier configuration
Exercise 7.2 Input impedances
Exercise 7.3 Phase margins
Exercise 7.4 Phase margins
Exercise 7.5 Stability and phase marging
Exercise 7.6 Multiple configurations - which is stable??
8 Opamp internals
Exercise 8.1 A differential pair
Exercise 8.2 A current source
Exercise 8.3 A current source
Exercise 8.4 A differential pair
Exercise 8.5 A simple opamp schematic
Exercise 8.6 A bipolar output stage
Exercise 8.7 A MOS output stage
Exercise 8.8 An opamp circuit schematic
Exercise 8.9 An opamp circuit schematic
Exercise 8.10 An opamp circuit schematics
Exercise 8.11 An opamp circuit schematic
Exercise 8.12 A more elaborate opamp circuit schematic
9 Low-Q harmonic oscillators
Exercise 9.1 AN RC-phase shift oscillator
Exercise 9.2 An LC oscillator
Exercise 9.3 A 5-stage RC phase shift oscillator
Exercise 9.4 A 3-stage RC-phase shift oscillator
Exercise 9.5 A 3-stage oscillator with NPNs
Exercise 9.6 Something like a Wien bridge oscillator
Exercise 9.7 Something else like a Wien bridge oscillator
Exercise 9.8 An harmonic oscillator?
Exercise 9.9 An harmonic oscillator?
Exercise 9.10 An harmonic oscillator with RL and RC sections
Exercise 9.11 An harmonic oscillator?
Exercise 9.12 An harmonic oscillator?
Exercise 9.13 An harmonic oscillator?
Exercise 9.14 An harmonic oscillator?
Exercise 9.15 An harmonic oscillator with all pass sections?
Exercise 9.16 An harmonic oscillator?
Exercise 9.17 An harmonic oscillator with opampe?
Exercise 9.18 An harmonic oscillator and Nyquist plots
10 High-Q harmonic oscillators
Exercise 10.1 A Colpitts oscillator
Exercise 10.2 A Hartley oscillator
11 Introduction to RF electronics
Exercise 11.1 Transmit power
Exercise 11.2 What the wire?
Exercise 11.3 Impedances from reactances
Exercise 11.4 An RF amplifier