TTL NAND Gate with Totem Pole Output Analysis in Hindi | TECH GURUKUL By Dinesh Arya
In this lecture we will study why we need totem pole or Active pull output and what is the need of diode D in output.
We will also analyse the circuit quantitatively.
So for better understanding of TTL NAND gate with TOTEM pole output, watch the video till end.
TTL NAND GATE with TOTEM POLE OUTPUT Analysis
The most basic TTL circuit has a single output transistor configured as an inverter with its emitter grounded and its collector tied to Vcc with a pull-up resistor, and with the output taken from its collector.
Most TTL circuits, however, use a totem pole output circuit, which replaces the pull-up resistor with a Vcc-side transistor sitting on top of the GND-side output transistor.
The emitter of the Vcc -side transistor (whose collector is tied to Vcc) is connected to the collector of the GND-side transistor (whose emitter is grounded) by a diode. The output is taken from the collector of the GND-side transistor.
To learn in a better way, you must go through these lectures also
Link for playlist of Introduction to Digital Logic Families
Link for playlist of Characteristics of digital ICs
Link for playlist of Digital Electronics