This 20 MHz bandwidth circuit was suggested by the National Semiconductor in 1970 documentation. Modern equivalent operational can be used.
The circuit we showed was obtained from our publication on relays and makes use of any...
This VCO with the 4046 PLL generates signals from 0 to 1.5 kHz. The circuit is from a Radio...
The base of this circuit is 1/4 of an integrated circuit 4136 which consists of a quadruple 741....