This ultra-low noise amplifier and simple power supply was found in Analog Devices documentation from the 90's. The circuit can be implemented with modern equivalent components.
This is a common oscillator configuration that generates rectangular signals in phase opposition. This...
This is half of a 4-channel amplifier from a system published in the October 1971 issue of Radio...
This circuit is suggested by Texas Instruments and with the component values we have a cutoff...