A technical reference guide containing formulas and calculations for amplifier design parameters such as noise gain, bandwidth, and impedance.
This document serves as a technical reference for designing amplifiers, providing essential mathematical relationships and constants. It details the calculation of closed-loop bandwidth and noise gain, defining the relationship between open-loop gain, closed-loop gain, and noise gain as NG = 1 + R2/R1. The guide also includes fundamental physical constants for noise calculations, such as the thermal voltage constant (4kT) at 25°C.
| Noise Gain Formula | NG = 1 + R2/R1 |
|---|---|
| Closed-Loop Bandwidth Formula | BW = 1.57 fCLGAIN |
The Noise Gain is calculated as 1 plus the ratio of R2 to R1.
It is calculated by multiplying 1.57 by the closed-loop gain.