Equalizer Preamplifier (CB24709E)

This circuit was found in the July 1982 issue of Radio Electronics magazine. The integrated circuit is of a newly released type at the time.

| Clique na imagem para ampliar |

4-Tone Oscillator (CB21115E)
Using 4 operational amplifiers this circuit generates 4 different tones. The circuit is from an...
Positive or Negative Voltage Doubler (CB1229E)
In the figure we have an application of an oscillator 4013 as voltage multiplier. It consists of a...
10 to 84 MHz Colpitts oscillator (CB4052E)
This Colpitts crystal oscillator was found in an American publication for amateurs in the 1980s....