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Single-peak Filter Circuit Composed of One Operational Ampli

2017-02-19 14:26  
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Single-peak Filter Circuit Composed of One Operational Amplifier
Single-peak Filter Circuit Composed of One Operational Amplifier
The single-peak filter composed of one operational amplifier is shown in the figure. This circuit only uses one operational amplifier and a few components to build up filter circuit that has the same performance composed of LC components. The resonant frequency can be easily tuned without changing the circuit gain. This circuit uses potentiometer PR1 to tune the resonant frequency. When the value of PR1 varies from minimum to maximum, the resonant frequency tuned range is 1580Hz, and the circuit gain hardly changes.