B21126E)
This circuit was taken from an old Popular Electronics. The circuit can have its frequency changed from an external signal. The center frequency is given by C1.
This circuit was found in the April 1984 issue of Radio Electronics magazine. The integrated...
The presented circuit was found in the National Semiconductor's Linear Applications Handbook from...
This circuit is basically the same as the previous configuration (CB15616E) with a power stage with...