Yeah, using an integrate-and-dump circuit would be the way I would normally make a sawtooth generator circuit, but it seems they want you to use a summing amplifier on all of the input terms that you are provided. I think the main things you need to get right in your circuit is to scale and offset the output correctly based on the input waveforms.Ravrage said:
So just start with a summing amplifier stage to add up the 4 input waveforms. That will give you an approximation of a sawtooth waveform, but with too large an amplitude and centered at 0V instead of running 0V to 5V as shown in the graph. Then what can you do to offset the output waveform in the positive direction to get closer to the final graph.Ravrage said:
I was confused about the DC sources shown in your schematic. The question looks like it wants you to base the opamp circuit on the "Black Box", which has the 4 sinusoidal input waveforms, and produces something close to the desired sawtooth waveform at its output. Where did the idea of using DC sources in the circuit come from?Ravrage said:
The harmonic amplitudes (relative) are defined by the Fourier expansion equation. You need to adjust the overall gain to get the correct total amplitude, and you need to add in an offset so the waveform has that DC component shown in the graph.Ravrage said:
A sawtooth wave generator is a circuit that produces a sawtooth wave using operational amplifiers. It is commonly used in electronic devices for various applications such as frequency modulation, time-base generation, and waveform generation.
The circuit typically consists of an operational amplifier, a feedback resistor, and a capacitor. The capacitor charges and discharges through the feedback resistor, creating a ramp-like waveform that resembles a sawtooth. The operational amplifier amplifies and shapes this waveform to produce a stable and accurate sawtooth wave.
Operational amplifiers have high gain, input impedance, and bandwidth, making them ideal for generating precise and stable sawtooth waves. They also have the ability to amplify and shape the waveform, allowing for more flexibility in the output signal.
Sawtooth wave generators are commonly used in various electronic devices, including function generators, synthesizers, and oscilloscopes. They are also used in industries such as telecommunications, music production, and research laboratories.
One limitation is the accuracy of the generated waveform, which can be affected by factors such as temperature and component tolerances. Additionally, the waveform may exhibit distortion or noise if the circuit is not designed properly or if the operational amplifier is not of high quality.
