This circuit found in a 1964 US publication reverses the signal level by providing 9 to 0 V outputs from 0 to 9 V signals. Transistors may be equivalent.
This 3 + 3 V symmetrical source circuit uses an old operational amplifier. The circuit is from an...
This circuit for low frequency data transmission was found in the May 1977 issue of Radio...
This circuit was obtained from an English documentation, with the purpose of carrying out the...