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likephysics
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How to design a Output enable ckt (like the ones in logic gates and buffers) using a simple component like BJT or FET.
Where do I get the output?skeptic2 said:Have you considered using a pnp transistor with the emitter connected to Vcc, the collector connector connected to the logic gate output and the base connected through a resistor to be your enable control?
An 'Output Enable' switch using BJT (bipolar junction transistor) or FET (field-effect transistor) is a type of electronic switch that is used to control the output of a circuit. It allows the user to turn the output on or off by controlling the flow of current through the transistor.
A BJT 'Output Enable' switch works by using a small current signal to control a larger current flow through the transistor. By applying a voltage or current to the base of the transistor, the switch can be turned on or off, allowing the output to be enabled or disabled.
One advantage of using a FET 'Output Enable' switch is that it has a high input impedance, meaning it requires very little current to control the output. Additionally, FETs have a lower voltage drop across the switch, resulting in less power loss and higher efficiency.
One disadvantage of using a BJT 'Output Enable' switch is that it requires a larger current to control the output compared to a FET. This can lead to higher power consumption and lower efficiency. Additionally, BJTs are more sensitive to temperature changes and can be more prone to thermal runaway.
'Output Enable' switches using BJT or FET are commonly used in digital logic circuits, microcontrollers, and power management systems. They are also frequently used in audio amplifiers, motor control, and other electronic devices that require a switch to control the output.