Triggered Oscillator (CB18275E)

The circuit shown in the figure generates a rectangular signal that depends on R and C, when its input goes to the high level.

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1 kHz Active Band Pass Filter RC4558 (CB19782E)
This circuit uses two Raytheon RC4558 operational amplifiers that are similar to the 741. The...
Headphone Amplifier LM3900 (CB13929E)
This small stereo amplifier for headphones was found in a documentation on integrated circuits from...
Gate Dipper (CB13563E)
This is a MOSFET version of a grid dip meter for frequencies between 1.8 MHz and 150 MHz,...