This very low frequency circuit was found in a 1964 Electronic Design. Transistors may be modern equivalents. The filter is low pass type.
We find this circuit in American documentation from the 1980s. It consists of a frequency folder...
Found in documentation from Analog Devices from the 90s, this amplifier uses a component from the...
June 2017 - The new power projection LEDs OSTAR projection from OSRAM can now be obtained from...