Operational Amplifier Applications Unit 1 – Introduction to the Circuit Board
Exercise 2 – Circuit Block Operation
EXERCISE OBJECTIVE
When you have completed this exercise, you will be able to connect the signal generator to
operate the various circuit blocks. You will determine circuit function by using the oscilloscope
to analyze input and output waveforms.
DISCUSSION
- Three circuit blocks are filter circuits. They are the HIGH PASS FILTER, LOW PASS
FILTER, and BANDPASS FILTER. - Filters are used to pass input signals of specific frequencies and reject, (filter out or block)
input signals of other frequencies. - The configuration of the circuit resistors and capacitors determine the filter application.
- The value of the resistors and capacitors determines the frequencies to be filtered or passed.
- HIGH PASS FILTERS pass high frequency input signals and reject (attenuate) low
frequency input signals. - LOW PASS FILTERS pass low frequency input signals and reject (attenuate) high frequency
input signals. - BANDPASS FILTERS pass a range of frequencies. Input signals with frequencies which are
within that range are passed to the output. Frequencies above or below the filter’s range are
rejected.