Precision Current Source (CB24752E)

Using a transconductance operational amplifier, this circuit was found in July 1983 Radio Electronics. The power supply must be symmetrical.

Logic Probes (CB11570E)
This circuit indicates the logical level of a CMOS circuit, extracting the power from the circuit...
Higher Current Voltage Variator LM3900 (CB5058E)
The circuit of the figure serves the same purpose as the previous one (CB5057E), but has a...
1 kHz oscillator 4001 (CB16317E)
The oscillator in figure 1 can be used in alarm, call or warning systems, producing a sound of...