syamin0712
Member level 1
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Hi,
I try to designing my inverting amplifier circuit using LT1360 and simulate using Multisim before plan to implement it for real circuit.
Let say my sinewave input is 500mV with frequency 2 MHz and I want my output around 10Vp-p.
So, by using the standard formula of inverting amplifier my gain should be around -20.
Thus, I decided to use resistor that feed through inverting input, R1=1k ohm and feedback resistor, Rf=20K to get the gain,A=-20.
However, the result shown was not exactly 10 Vp-p even in simulation and it looks like has a lit bit shifting.
https://obrazki.elektroda.pl/1422791400_1440829933.png
https://obrazki.elektroda.pl/8778963400_1440829933.png
So, I tried play around with the input signal. I noticed that, if the input signal is just in Volt (i.e 5Vp-p) then by using gain 2 (R1=1k ohm and Rf=2K) i got exactly 10Vp-p without shifthing.
Does it because of this ic cant catter for small input like mV or higher gain?How can I know it?Or is there any other factors effects my simulation result?
Also, I have modified the circuit to become 2 stage amplifier with the first stage is amplify to 2.5Vp-p and 2nd stage then I amplify to get around 10Vp-p, It still has a little shifting but much better if compared to the single stage amplifier.
Please help.thank you
I try to designing my inverting amplifier circuit using LT1360 and simulate using Multisim before plan to implement it for real circuit.
Let say my sinewave input is 500mV with frequency 2 MHz and I want my output around 10Vp-p.
So, by using the standard formula of inverting amplifier my gain should be around -20.
Thus, I decided to use resistor that feed through inverting input, R1=1k ohm and feedback resistor, Rf=20K to get the gain,A=-20.
However, the result shown was not exactly 10 Vp-p even in simulation and it looks like has a lit bit shifting.
https://obrazki.elektroda.pl/1422791400_1440829933.png
https://obrazki.elektroda.pl/8778963400_1440829933.png
So, I tried play around with the input signal. I noticed that, if the input signal is just in Volt (i.e 5Vp-p) then by using gain 2 (R1=1k ohm and Rf=2K) i got exactly 10Vp-p without shifthing.
Does it because of this ic cant catter for small input like mV or higher gain?How can I know it?Or is there any other factors effects my simulation result?
Also, I have modified the circuit to become 2 stage amplifier with the first stage is amplify to 2.5Vp-p and 2nd stage then I amplify to get around 10Vp-p, It still has a little shifting but much better if compared to the single stage amplifier.
Please help.thank you