Tagged Questions

3
votes
1answer
79 views

Strange behavior from variable-gain amplifier

Sorry, this might not go anywhere. My first SE question, though, on any site. I've built at least three distinct audio amplifiers with the TDA7056B, which is a really great amp. It takes a voltage ...
2
votes
1answer
113 views

Is a low load resistor a big problem in low pass filter and amplifier circuit

I am going to use AVR's PWM output signal to pass through a low pass filter (maybe plus an amplifier). I found the speaker has a quite low resistance (8 ohms). I tried to simulate my schematic on ...
2
votes
3answers
458 views

How to configure an analog filter(s) to maximally smooth out a 100 Hz PWM signal from a LED controller

I have an RGB LED controller which controls the brightness using a 100 Hz PWM, seemingly without any built-in smoothing at all. (recorded it with a soundcard, and those pulses are 100 percent ...
0
votes
3answers
275 views

Is there a voltage regulator IC that takes PWM input?

I am looking for a small IC that provides a regulated dc voltage based on the duty cycle of the input. This is probably asking for a lot but does anyone know if one exists. Essentially I need a low ...