Analog

Op-Amps introduction

OP-Amp

Today I want to speak about op-amps. These wonderful, but mysterious components, we have heavely often appearing in circuit schematica of analog or analog / digital hybrid circuits. We want to demistify these components.

op-amp

There are two basic thumb rules when handling ideal op-amp circuit. (Real-world op-amp circuits are a bit more complicated, but we will discuss this later).

1. The first thumb rule is that Vout is essentially the difference of the voltage values at the both inputs, multiplied with an arbitrary but high amplification factor A.

Analog Computers 101

== Analog Computers

Today I want to speak about analog computers. In todays times analog computers are leading a shadowy existence, compared to their digital counterparts. But they are wonderous little machines. And that machines I mean wordly because there exists analog mechanical computers that are models from the world and used to compute and predict tides in certain areas of the world . Also the brain is an enourmous analog computer with a comparatively very small enery budget. It only takes 12 Watt. 12 Watt; that is not even a quarter of the power supply budget of a laptop, which uses 65 Watt. And you can do very heavy lifting with the brain, but back to topic. I want to talk mainly about analog electronic computers, during the world war two those were used to compute ballistic curves. So analog computers can sum up, multiply, divide, integrate and differentiate like their digital counterparts.