Upon pressing the switch, the circuit generates a pulse whose duration depends on C. The transistors can be BC548 and the power can be between 1 and 6 V. The circuit is from a 1975 publication.
This low pass filter has attenuation of 5.5 dB and the frequencies depend on the values of the...
This circuit simulates the effect of an inductance. Equivalent operational amplifiers can be used,...
We found this circuit in the Philips Databook of 1990. The circuit is indicated for low-cost...