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We’ve looked at op-amps as comparators & amplifiers, so now let’s look at what their outputs may be connected to!
Continue reading “PHY C21: Outputs of Op-Amp Circuits”
- Output devices
- Digital meters
Now, let’s take a closer look at negative feedback.
Continue reading “PHY C21: Inverting & Non-Inverting Amplifiers”
- Effects of Negative Feedback
- Inverting amplifiers
- Virtual earth approximation
- Non-inverting amplifiers
- Expressions for voltage gain of inverting & non-inverting amplifiers
Before we jump into inverting & non-inverting amplifiers, let’s get ourselves cozy with feedback:
Continue reading “PHY C21: Feedback in Op-Amps”
- Positive Feedback (not in syllabus)
- Negative Feedback
In this chapter, we will take a look at one of the most widely used electronic devices: the operational amplifier (Op-Amp for short)!
Continue reading “PHY C21: Operational Amplifiers”
- Use of operational amplifiers as comparators
- Properties of ideal op-amps
- Graphs of input vs output voltage
2 chapters in 1 post? Let’s go!
Continue reading “PHY C19/20: Electronic Sensors”
- Electronic sensors
- NTC Thermistors
- piezo-electric transducer
- metal-wire strain gauge
- Potential dividers
Continue reading “PHY C18: Discharging Capacitors”
- Discharge curves
- Potential Difference
- Time constant
Continue reading “PHY C18: Combined Capacitance”
- Formulae for combined 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.
Continue reading “PHY C18: Capacitance”
- Definition of Capacitance
- Isolated conductors
- Parallel-plate capacitor
- C = Q/V