Tagged Questions

-1
votes
0answers
45 views

Problem with simple RC oscillation circuit

I tried to follow this simple RC oscillation circuit: I connected a 470 Ohm resistor (say R1) and a 10 uF capacitor (say C1) in series and from the negative end of the C1 cap I attached another 470 ...
3
votes
2answers
134 views

What's wrong with this Phase Shift Oscillator?

I am trying to design a phase shift oscillator, using a CE Amplifier. I have a Vc of approximately 6V, gain of approximately 40(>29, as required). I aim for an oscillation frequency of 1.5 kHz. But ...
1
vote
1answer
414 views

Bjt astable multivibrator questions

I'm working on a little project(an infrared jammer) and I'm having a few issues. Why (and how) exactly do circuits like the one below use electrolytic capacitors? Wouldn't ceramic capacitors be ...
6
votes
2answers
352 views

Role of capacitor in this circuit

I have troubles understanding the role of C1 capacitor in the oscillating circuit from the schematic below: My question is: what is the role of C1 in this circuit? Is it to ensure that the circuit ...
4
votes
1answer
4k views

How to design the capacitors used with Crystal Oscillators?

I have seen circuits involving crystal oscillators connecting two capacitors between each of the crystal legs and ground. I would like to know how to design the value of these capacitors for different ...
0
votes
2answers
628 views

Why is a capacitor placed in parallel with oscillator output?

I have a circuit board with an oscillator and I'm curious about why there is a capacitor hooked up to the output. The oscillator is a SWO series HCMOS Square Wave output crystal oscillator. The ...
1
vote
2answers
624 views

How to avoid ±voltage on capacitors in astable multivibrator

I've been experimenting with oscillators, and am particularly fond of a very low-current MOSFET design that uses ceramic capacitors and oscillates at about 1 to 10 Hz. However, I am having trouble ...
2
votes
2answers
397 views

Explain this circuit?

This is one of the circuits in the Electronics 9/10 class. The package did not explain how transistor combination worked and why the capacitor will reverse its current. Can you explain this ...