Inverting CMOS Amplifier (CB25577E)

This gain 10 CMOS op amp was found in the May 1993 issue of Electronics Now magazine. It is applicable to any op amp.

Varicap Variable Frequency Oscillator (CB13088E)
The great advantage of the circuit shown in the figure is the fact that its frequency is...
30 to 40 kHz neon oscillator (CB8137E)
Found in American documentation from 1969, this circuit produces a pulsating waveform being...
Digital volume indicator (CB7008E)
Found in an old Elektor, this circuit uses two 7-segment displays to indicate the volume of an...