User manual

22
3.0 Function Generator and Mixed-Signal Oscilloscope
VirtualBench contains both a function generator (FGEN), which is capable of producing standard patterns such as sine,
triangle, and square waves, as well as a mixed-signal oscilloscope (MSO), which can capture acquired records of various
waveforms.
The FGEN is capable of producing sine waves with a frequency of up to 20 MHz at a maximum voltage of 12 V into a
high-load impedance. The MSO has a 1 MΩ input impedance, a maximum input range of 40 V
pp
, and an analog
bandwidth of 100 MHz (with a sample rate of 1 GS/s).
These two VirtualBench instruments are useful for instructors, students, engineers, and scientists for generating
controlled signals and taking measurements in circuits and measurements laboratories.
Learning Objectives: You will understand these core VirtualBench concepts after completing the activities in this
chapter:
1. How to generate sine, square, and triangle patterns using the FGEN
2. How to take acquired records with the oscilloscope (MSO) and analyze waveform characteristics such as
amplitude and rise time
3.1 Reviewing the Circuit Theory With Simulation
Follow along with these simulation experiments by using these files: VirtualBench Section3_Amplifying Circuit
Design.ms13 and VirtualBench Section3_RC Circuit Design.ms13.
An operational amplifier (op-amp) is a high-gain voltage amplifier with a differential input and a single-ended output.
Op-amps produce output potentials that are typically hundreds or thousands of times greater than the potential
difference between their input terminals.
They can be used for several different types of applications, from simply amplifying voltage signals to inverting voltage
signals to even acting as voltage followers. In this chapter, build a non-inverting amplifying circuit to take oscilloscope
measurements of a waveform amplitude. Also create an RC circuit to measure rise time.
Before building the circuits, first simulate them using Multisim as shown in figures 3.1–3.3.