This circuit, found in a 1958 magazine, is for reference only, since the components are not easy to find today. The transistors are germanium types and power supply is made by common cells.
The current of this source is 200 mA at the most, and the output depends on the zener that may...
This peak detector has a memory to prolong the response. The circuit is from American...
The circuit in the figure uses the four current amplifiers of the LM3900 to generate a sawtooth signal...