Hi all,
I'm building a simple two stage, +5V single supply, amplifier circuit. It consists of two operational amplifiers in the non-inverting configuration. It is powered by a 9V battery going to a 5V regulator. I was just wondering if I need a current amplifier stage in order to produce the necessary current to run a two stage amplifier versus a single stage. I suppose my question is: do I need twice the current to run a two stage amplifier as opposed to a single stage? They both operate at the same voltage so I figure that, since they're in parallel with identical components, they, in theory, need double the current that a single stage amplifier would. So I figure I could have a simple common emitter BJT amplifier stage with a beta coefficient of 2 inbetween the 9V battery and the 5V regulator. I figure the drop in voltage across this amplifier will still be in the operating range of the 5V regulator.
So that's my game plan so far. I was wondering if anyone had any insights into flaws in this plan or potential pitfalls. I've been pretty careful about decoupling and power supply bypassing.
Thanks in advance for your help!
I'm building a simple two stage, +5V single supply, amplifier circuit. It consists of two operational amplifiers in the non-inverting configuration. It is powered by a 9V battery going to a 5V regulator. I was just wondering if I need a current amplifier stage in order to produce the necessary current to run a two stage amplifier versus a single stage. I suppose my question is: do I need twice the current to run a two stage amplifier as opposed to a single stage? They both operate at the same voltage so I figure that, since they're in parallel with identical components, they, in theory, need double the current that a single stage amplifier would. So I figure I could have a simple common emitter BJT amplifier stage with a beta coefficient of 2 inbetween the 9V battery and the 5V regulator. I figure the drop in voltage across this amplifier will still be in the operating range of the 5V regulator.
So that's my game plan so far. I was wondering if anyone had any insights into flaws in this plan or potential pitfalls. I've been pretty careful about decoupling and power supply bypassing.
Thanks in advance for your help!