We found this circuit in a 1973 publication. The circuit lets frequencies below 480 kHz pass through with an output impedance of 1k. The circuit can be implemented with current operational.
This circuit simulates a multi-position switch using programming buttons. The circuit is from an...
This simple current control setup was found in documentation from the 60's. The low current...
This Wien bridge circuit, using a 741 operational amplifier, was suggested by Texas Instruments in its 1996...