This circuit also appears elsewhere on this site, obtained from other sources. This is an 80's American schematic book. Instead the lamp can be used white high-brightness LEDs.
This circuit provides a linear attenuation of a signal up to 100 dB. The circuit operates with...
This high impedance circuit for low voltage sensors was found in a 1980s documentation. The JFETs...
We found this circuit in a 1989 publication. Its purpose is to produce noise in the VHF or UHF...