PC and microcontroller based automated instrument for measuring frequency response of operational amplifier active filters

Date

5-2007

Degree

Bachelor of Science in Applied Physics

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Nelio C. Altoveros

Abstract

An automated frequency response measurement device for testing operational amplifiers active filters was designed and constructed. The instrument was constructed to automatically generate sinusoidal signals, measure the corresponding amplitude response and output via personal computer (PC). The device was designed to generate waveform signals from 10MHz with 10 points per decade. Calibration results show that the automation of the signal generator has percentage difference of 5% to its actual value with percentage deviation of less than 1%. However, errors on peak detection at higher frequency and attenuation of signals of the signals generator reduce the frequency limit to IMhz. A single pole high pass and low pass filter was implemented to test the function of the device. Results show that the device was able to generate plots similar to the pones generated using a function generator and oscilloscope. Standard deviation in the measurement of peak voltages was found to range from 0 to 15mV.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Document Type

Thesis

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