This circuit is suitable for use in radio receivers to improve the quality of weak signal stations. The circuit was suggested by the May 1994 issue of Electronics Now magazine.
This configuration, which does not have a very high Q, uses a 741 operational amplifier, but other...
This circuit generates low-frequency sinusoidal signals. The variable capacitor is dual and the...
This circuit was found in a documentation of the year 1958. The transistors are germanium types...