Phantastron
A Phantastron is a type of monostable multivibrator and has been used as a sawtooth generator and timer .
The Phantastron forms a square pulse from a short start pulse, which is very precise in time and whose length is linearly determined by a control voltage. It was invented during radar development in World War II .
The circuit principle is that the exponential charge / discharge curve of an R / C combination, which is often common for timing elements, is replaced by a Miller integrator with a linear time sequence. In the past, it was mainly implemented using a pentode or heptode . Transistor circuits with this circuit principle were also implemented later. A self-excitation (recovery of the start pulse from the end of the rectangular pulse) is also possible. This is how a sawtooth generator is created. Such circuits were used in early synthesizers .
The output pulse was used as a control signal in gate circuits. In some cases, the sawtooth pulse generated internally by the Miller integrator was also used for deflection voltages from picture tubes.
Individual evidence
- ↑ Article Fantrastron in the Great Soviet Encyclopedia (BSE) , 3rd edition 1969–1978 (Russian)
- ^ US Navy Electricity and Electronics Training Series, Book 18, pp. 3–12 (or: p. 122 of 204). ( PDF ( Memento of the original from March 23, 2016 in the Internet Archive ) Info: The archive link has been inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this note. , HTML )
