Transistor-transistor logic (TTL) then supplanted DTL. For higher speed and better density, the resistors used in RTL were replaced by diodes resulting in diode-transistor logic (DTL). RTL gates were used in early integrated circuits.
Unlike simple diode logic gates (which do not have a gain element), RTL gates can be cascaded indefinitely to produce more complex logic functions. The simplest family of logic gates using bipolar transistors is called resistor-transistor logic (RTL). "To build a functionally complete logic system, relays, valves (vacuum tubes), or transistors can be used.
The vector stencils library "Logic gate diagram" contains 17 element symbols for drawing the logic gate diagrams.
#Tube amplifier circuit pro
The example "Circuit diagram - EL 34 schematics" was drawn using the ConceptDraw PRO diagramming and vector drawing software extended with the Electrical Engineering solution from the Engineering area of ConceptDraw Solution Park. This circuit diagram sample was redrawn from the Wikipedia Commons file: E元4 schematics (circuit diagram).gif. Russian analog is 6P27S (Cyrillic: 6П27C )" The American RETMA tube designation number for this tube is 6CA7.
#Tube amplifier circuit series
It has an international octal base (indicated by the '3' in the part number) and is found mainly in the final output stages of audio amplification circuits and was designed to be suitable as a series regulator by virtue of its high permissible voltage between heater and cathode and other parameters. "The E元4 is a thermionic valve or vacuum tube of the power pentode type. Some electron tube devices rely on the properties of a discharge through an ionized gas." Vacuum tubes mostly rely on thermionic emission of electrons from a hot filament or a cathode heated by the filament. The device can be used as an electronic amplifier, a rectifier, an electronically controlled switch, an oscillator, and for other purposes. Addition of a third and additional electrodes allows the current flowing between cathode and anode to be controlled in various ways. The simplest vacuum tube, the diode, contains only two elements current can only flow in one direction through the device between the two electrodes, as electrons emitted by the hot cathode travel through the tube and are collected by the anode. "In electronics, a vacuum tube, electron tube (in North America), tube, or thermionic valve or valve (in British English) is a device controlling electric current through a vacuum in a sealed container.
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