Constant current source (CB8822E)

This 2mA source was found in a 1968’s Philips documentation. The transistor may be the BC549.

| Clique na imagem para ampliar |

Comparator with hysteresis (CB5089E)
This is one of the many hysteresis comparator circuits the reader may find in this section and on this...
Burst Square Signal Generator 555 (CB15436E)
The circuit shown in the figure generates a square signal (50% active cycle) when the pressure switch...
Audio Voltmeter (CB25356E)
The purpose of this circuit is to measure the intensity of audio signals. We found it in the...