Telephone dialer (CB8521E)

Using an integrated circuit from the time, we found this configuration in a 90s Radio Electronics.

| Clique na imagem para ampliar |

1W Amplifier For Headphones (CB12960E)
The circuit shown in the figure is suggested by ON Semiconductor (www.onsemi.com), based on its...
LMH2832 Variable Gain Digital Amplifier (COM119E)
September 2016 - can be found at Mouser Electronics the new amplifiers with digital variable gain...
Audio Mixer Preamplifier (CB23904E)
This simple 1-transistor audio preamplifier appeared in the June 1968 Radio Electronics magazine. The...