4 ms·
> how the recursion in these types of analogue circuits happens instantaneously. Yeah, theoretically instantaneous, in practice not. (There's a measure for tha
by raverbashing 4y ago
> how the recursion in these types of analogue circuits happens instantaneously.
Yeah, theoretically instantaneous, in practice not. (There's a measure for that but I can't remember how's it called)
Even funnier that the feedback actually increases the bandwidth of the system, compared to the open loop amplifier.
- Cloudly 4y ago>There's a measure for that but I can't remember how's it called Slew rate for opamps I believe Also worth noting that the "recursion" without negative feedback will hit a limit when the op-amp is saturated. Similar to a "stack overflow" I guess. Things mostly won't break but you'll get a flat output at the positive or negative rails of the op-amp - which causes some of the pain of analog signal processing.
- hex4def6 4y ago>Even funnier that the feedback actually increases the bandwidth of the system, compared to the open loop amplifier. The reason for this is because of how bandwidth is defined, which is basically the point at which the amplifier gain starts dropping the higher the frequency you go. Adding feedback is effectively clipping the low frequency/ high gain area with the net effect that the gain versus frequency plot is a lot flatter (but now, instead of being able to get say 10,000x gain at 1Hz, you're clipping it to 100x, since you're unable to get 10,000x at 1Mhz)