Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
Since I brought up the problem of distortion and gain control a few posts ago, I felt responsible for addressing it. Attached is a schematic for the Colpitts oscillator that I previously posted, but with a diode limiter added. If a diode limiter is inserted in the proper place in the feedback loop, it will accomplish nearly the same thing as a fancy AGC circuit, but with far fewer parts (unless you happen to have the perfect light bulb at hand). The output pic shows a fairly clean sine wave. Output amplitude is dependent on the ratio of the feedback resistors R1/R2.
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