This circuit is from March 1978 Radio Electronics. The 4-digit circuit uses a period module and is battery powered. The main integrated circuits are CMOS and TLL.
This is a traditional inverter amplifier configuration with voltage gain 10. The operational...
This low-pass filter was found in Intersil documentation from the 1980s. The circuit makes use of...
This circuit is from Radio Electronics from the 90s. It supplies a voltage between 800 V and 2 000...