This TTL circuit is from a Radio Electronics magazine from February 1973. The circuit must be powered with 5 V and the maximum frequency depends on the TTL integrated circuit.
This modulator circuit for transmitters was found in American documentation from 1964. It can be...
With this circuit it is possible to have a symmetrical source from a simple source with voltages from...
This circuit is used to output communications receivers that use low-impedance headphones or...