We’ve looked at op-amps as comparators & amplifiers, so now let’s look at what their outputs may be connected to!
- Output devices
- Relays
- LEDs
- Digital meters
- Calibration
PHY C21: Inverting & Non-Inverting Amplifiers
Now, let’s take a closer look at negative feedback.
- Effects of Negative Feedback
- Inverting amplifiers
- Virtual earth approximation
- Non-inverting amplifiers
- Expressions for voltage gain of inverting & non-inverting amplifiers
PHY C21: Feedback in Op-Amps
Before we jump into inverting & non-inverting amplifiers, let’s get ourselves cozy with feedback:
- Feedback
- Positive Feedback (not in syllabus)
- Negative Feedback
PHY C21: Operational Amplifiers
In this chapter, we will take a look at one of the most widely used electronic devices: the operational amplifier (Op-Amp for short)!
- Use of operational amplifiers as comparators
- Properties of ideal op-amps
- Graphs of input vs output voltage
PHY C19/20: Electronic Sensors
2 chapters in 1 post? Let’s go!
- Electronic sensors
- LDR
- NTC Thermistors
- piezo-electric transducer
- metal-wire strain gauge
- Potential dividers
PHY C18: Uses of Capacitors
A short one this time! No maths, just facts.
- Uses of capacitors
PHY C18: Discharging Capacitors
- Discharge curves
- Charge
- Current
- Potential Difference
- Time constant
PHY C18: Energy Stored by Capacitors
- Energy Stored by Capacitors
- deducing W = 1/2 QV
PHY C18: Combined Capacitance
- Formulae for combined capacitance
- in series
- in parallel
- Problem-solving
PHY C18: Capacitance
We know that electric charges & electric potential are related:
- An imbalance of charges creates a difference in electric potential (AKA an electric field is induced!).
- If electric charges are free to move, they will move when there is a difference in electric potential.
But what if the charges are NOT free to move?
Now we will take a look at objects which hold an IMBALANCE of charge: capacitors.
- Definition of Capacitance
- Isolated conductors
- Parallel-plate capacitor
- C = Q/V
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