s55
Junior Member level 2
Hi, let me try to ask a stupid question.
I'm a beginner for analog circuit design, and I'm reading a following book written by Prof. Sedra.
https://www.amazon.com/Microelectronic-Circuits-Electrical-Computer-Engineering/dp/0195323033
Ideal voltage amplifier model has an infinite value of input resistance (Rin) and a zero output resistance(Rout).
I understood that entire input voltage should be dropped across Rin, and its output voltage needs to be dropped to a load resistance, without dropped voltage in Rout. Please see the figure only, without a question in the following link page.
https://www.chegg.com/homework-help...ble-11-r-5-k2-r-50-k-s2-g-10-ma-v-a-q39955434
How about a voltage gain?
From my derivation,
voltage gain = Vout / Vin = (Iout X Rout) / (Iin X Rin) = (current gain) * (Rout/Rin)
voltage gain will be 0 or very small value, when Rin=infinite (or large value) and Rout=0 (or very small value).
I believe I'm wrong, but I'm not sure what should be corrected. Could you please correct me?
I'm a beginner for analog circuit design, and I'm reading a following book written by Prof. Sedra.
https://www.amazon.com/Microelectronic-Circuits-Electrical-Computer-Engineering/dp/0195323033
Ideal voltage amplifier model has an infinite value of input resistance (Rin) and a zero output resistance(Rout).
I understood that entire input voltage should be dropped across Rin, and its output voltage needs to be dropped to a load resistance, without dropped voltage in Rout. Please see the figure only, without a question in the following link page.
https://www.chegg.com/homework-help...ble-11-r-5-k2-r-50-k-s2-g-10-ma-v-a-q39955434
How about a voltage gain?
From my derivation,
voltage gain = Vout / Vin = (Iout X Rout) / (Iin X Rin) = (current gain) * (Rout/Rin)
voltage gain will be 0 or very small value, when Rin=infinite (or large value) and Rout=0 (or very small value).
I believe I'm wrong, but I'm not sure what should be corrected. Could you please correct me?