How transistor can be used as a NOT gate?

How transistor can be used as a NOT gate?

A NOT gate simply inverts its input. When no voltage is present on the input, the transistor turns off. When the transistor is off, no current flows through the collector-emitter path. Thus, current from the supply voltage (Vcc in the schematic) flows through resistor R1 to the output.

Is a logic gate a transistor?

“A logic gate in a microchip is made up of a specific arrangement of transistors. For modern microchips, the transistors are of the kind called Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET), and the semiconductor used is silicon. “In a logic-gate arrangement, each of the MOSFETs works like a switch.

How are resistor and transistor used in logic?

Logic operation is same as the open collector output. Use of transistors Q4 and diode is to provide quick charging and discharging of parasitic capacitance across Q3. Resistor is used to keep the output current to a safe value.

How to implement your own transistor logic gates?

Use jumper wires if necessary. The measured data is listed as follows (shown in the image) for each logic gate implementation. Note that connecting the input to ground would result to the same output as when letting it float (although you would have stray noise voltage signals up to hundreds of millivolts at the input pin)

How are TTL inputs equivalent to multiple transistors?

TTL inputs are the emitters of bipolar transistors. In the case of NAND inputs, the inputs are the emitters of multiple-emitter transistors, functionally equivalent to multiple transistors where the bases and collectors are tied together. The output is buffered by a common emitter amplifier. Inputs both logical ones.

What should the output of a pass transistor be?

For cascading, the output of a pass transistor (#1) should not drive the gate of another MOS device (#2). This will produce an output = V dd-V