Buffer for VFO (CB7282E)

This circuit was obtained in a Popular Electronics from the 90's. The gain depends on R4 and R3. Transistors are general purpose types.

| Clique na imagem para ampliar |

High Impedance Differential Amplifier LM324 (CB15183E)
This circuit was found in the SGS manual of linear integrated circuits of 1982. The CMRR depends on...
Optical PFM Receiver (CB15961E)
In the figure we have a receiver for frequency modulated light signals (see the transmitter in...
High Stability Voltage Reference (CB1211E)
In the figure we have a high stability voltage reference, providing a voltage of 10 V at the...