sir,iam learning a basic course on electronics.. previously we have been taught OpAmps..in that i have few doubts 1)Where do we use buffers and what s the significance of using them.. 2)What are the typical values to be employed for R1 and R2 for an inverting Op Amp if i want a Gain of 100

 

1) when you need high impedance input -> low impedance output
2) the ratio of the resistors is 100, but you have to show your circuit diagram

 

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