Operational Amplifier - Video 1

This an introductory video. I would start with explaining what it is.
PLEASE READ THE TEXT AND THEN WATCH THE VIDEO.

A. Operational Amplifier is a analogue circuit, with a set of input and an output. It is a very flexible amplifier and by changing the external wiring, it can be used for different functions.
It uses include
- mathematical functions of adding and subtraction  multification.
- Amplifiers - DC amplifier and AC
- comparator
- Summation

B. Characteristics
- High gain
- Input impedance - very high and does not load the source
- Output impedance - zero
- Bandwidth - indefinite
- Supply voltage - unaffected by the load

C. Example
- Gain 200,000 voltage gain
- Input impedance - 2Mohm
- output impedance - 75 ohms
- Bandwidth - to 1 MHz
- Supply Voltage .... + and -  5 to 15 volts

D. Notation

The Operation amplifier can be shown as a 5 pin IC,