Zilsel Invent Blogspot

The fourth article in series about triangular oscillator is intended to explain operational amplifier slew rate parameter since it is important parameter when you are dealing with signal generators like it is square wave signal generator. Op amps are not ideal as any other components, and it is important to know how to choose right operational amplifier for signal generator applications.   Slew rate Operational amplifiers are not ideal components as any other electronic components and/or devices, there are a lot of different op amps designed with different slew rate value as it is presented on Figure #1. Slew rate is the parameter which determines how fast operational amplifier is able to change output signal/voltage regarding input voltage changes. The higher the slew rate value means faster operational amplifier and vice versa. Internally, operational amplifier slew rate parameter depends on the compensation capacitance Cc, very small amount of integrated capacitan...

This article is dedicated to the second modulation related to the VF driver revision 1.0 . Pulse width modulation (short PWM) is the method of the signal pulse width changes in order to control rotation speed of the DC motor shaft. This article will explain measurements taken by the oscilloscope, frequencemetre and voltmeter in order to present PWM signal modulation. VF driver revision 1.0 measurements This part will explain video clip related to the VF driver revision 1.0 measurements taken by the oscilloscope, frequencemeter and voltmeter in order to present pulse width signal modulation. This video is split into the two parts: the first part is related to the frequency modulation and the second is related to the PWM signal modulation.   Video : VF drive r revision 1. 0 measurements Frequency measurements Frequency is already explained under the previous article ( II part ), in this example the frequency is changed by changing variable resistor re...