Based on National Semiconductor's LM4130 reference circuit, this circuit was found in Internet documentation. The circuit has an output impedance of 1 Mohm.
This VHF transmitter was found in Radio Electronics magazine from June 1964. The transistor is an...
This two-transistor circuit is from a Radio Electronics magazine from April 1965. The transistors are...
This circuit was found in a 1967 documentation. The switch diode is a component of the time and is...