|
This amplifier have a (teoricaly) inifnite input inpedance and (teoricaly) ZERO output inpedance.
In the simulation we got a signal of 1mv boosted to 10v!
In a nutshell we have two differential amplifiers, the fist stage amplifies the signal 1.000 times and the second one multiplies by 10.
(Google it for the formulas, i'm too lazy)
Of course you can tune up the circuit by ajusting the 100R resistor, but as aways there's some problems... In real life the input signal is way too sensitive and anything can be amplified together, even RF signals, to avoid this you can use some RC, RL or RLC filters.
This kind of amplifier is used when you have a very weak and/or low voltage signal and you need to boost both voltage and current level.
A big example is yourself, like your heartbeat or neural signals.
|
