Amplifier stage (CB21821E)

This circuit was found in Mullard's 1960s transistor manual. The circuit employs contemporary germanium transistors and operates at 1.65 kHz.

| Clique na imagem para ampliar |

20 mA Current Source (CB13423E)
This source of constant current was obtained in an American documentation of 1973. The transistors can be...
Pink Noise Generator (CB17609E)
Unlike white noise, pink noise has a spectrum whose amplitude decreases with frequency. This...
Telephone Call Monitor (CB10509E)
This circuit was found in a 1985 English magazine, but it can still be easily assembled, as the...