Found in a 1967 RCA manual, this circuit uses components from the era that can be replaced by modern equivalents. The circuit is for resistive loads.
This VCO makes use of an RC4558 which is an operational amplifier with characteristics close to...
Found in an EDN from the 90s, this circuit uses operational amplifiers from that time, which are...
Found in a Popular Electronics of the 90s this configuration can be seen elsewhere on our site....