ECET 2310

1 / 10

# ECET 2310 - PowerPoint PPT Presentation

ECET 2310. Lecture Twenty-Three. Calculation of Noise Gain (Section 3.5). To Calculate the Noise Gain Disconnect all external sources and replace with their internal impedances

I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.

## ECET 2310

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

### ECET 2310

Lecture Twenty-Three

Calculation of Noise Gain (Section 3.5)
• To Calculate the Noise Gain
• Disconnect all external sources and replace with their internal impedances
• Treat the circuit as a noninverting amp circuit and calculate the gain from the noninverting terminal to the output. This resulting voltage gain is the noise gain.
Offset Voltages and Currents (Section 3.6)
• There are two effects to be considered
• Input Offset Voltage (from dc balance at the two inputs)
• Input Bias Current (currents required for proper dc biasing of internal components)
Offset Voltages and Currents (Section 3.6)
• Values of sources in model are:
• Vio = Input Offset Voltage
• Ib+ = Input Bias Current at noninverting terminal
• Ib- = Input Bias Current at inverting terminal
Offset Example
• For the circuit below, VIO = 1 mV, IB = 80 nA and IIO = 20 nA