Tagged Questions

1
vote
5answers
421 views

How to Generate a square, sine, and triangle wave with DC input

I want to make a simple synthesizer as a start to audio electronics. I want to start with a simple square, triangle, and sine, which the user can vary the pitch. Is there a simple circuit to do ...
-1
votes
1answer
96 views

Determing the Phase Angle of the following code: [closed]

I'm trying to determine the phase of xx after the code is run. You shouldn't need to actually run it to determine it however, as it is unclear on the graph. The two phases present appear to be (-3*j) ...
14
votes
5answers
3k views

What exactly are harmonics and how do they “appear”?

From reading so many sources online, I still cannot grasp why a different waveforms have harmonics. For example: when designing a silly amplitude modulation (AM) circuit that puts a square wave from ...
4
votes
3answers
482 views

Communication - 2 Battery Powered Circuits, 1 Conductor, no common ground

TL;DR I need to do is successfully transmit a wave across a single conductor between two battery powered circuits with no common ground. I already know how to create the wave and detect the wave when ...
7
votes
3answers
2k views

Changing a Signal's DC Offset

I have a square wave being generated from a waveform generator oscillating between 0 V and 5 V. The generator does not support negative DC offsets. I need to shift this signal down to be centered ...
1
vote
2answers
2k views

Relationship between sampling rate and number of levels/bits in PCM

It is said in the books that increasing the levels of quantisation codes in Pulse Code Modulation, or in other words increase the number of bits, could give a better signal. I understand that having ...
2
votes
3answers
244 views

Where should an increase in harmonic frequencies go in the Nyquist formula?

From the Nyquist formula that \$ Capacity = 2 \times Bandwidth \times log_2(L) \$, where \$L\$ is the level the signal represents, the total number of possible bit combinations the signal can ...
4
votes
2answers
738 views

Why Periodic Signals has only integer frequencies but non-periodic does not?

Why does a periodic signal only has integer frequency values while a non-periodic one has all real numbers as frequency values? The frequency is just the number of times one full cycle has happened ...