VCO without varicap (CB9435E)

This circuit was found in a 90s RF Design. It is an oscillator that can reach 800 MHz, with the frequency controlled by an input voltage.

| Clique na imagem para ampliar |

Gain 10 CA3140 Amplifier (CB15503E)
The voltage gain of the circuit shown in the figure is 10 times. This gain is given by the ratio...
Power supply for Transistor Circuits (CB11145E)
This circuit, from an old Argentine publication, uses a slightly different symbology than we are...
Modulated Siren 4001 (CB16318E)
In this circuit we have two oscillators, one controlling the other, using the 4 NAND gates of the...