Question

Figure P14.37 shows a two-input TTL NAND gate. The transistors are identical with high betas, $V_{B E}=0.7 \mathrm{~V}$ and assume $V_{C E(S A T)}=$ $0.25 \mathrm{~V}$; for the diode, assume $V_F=0.6 \mathrm{~V}$. Calculate $V_{O L}, V_{O H}$, and $V_{I L}$ for this circuit. Sketch the transfer characteristics of the circuit. Figure P14.37 can't copy

   Figure P14.37 shows a two-input TTL NAND gate. The transistors are identical with high betas, $V_{B E}=0.7 \mathrm{~V}$ and assume $V_{C E(S A T)}=$ $0.25 \mathrm{~V}$; for the diode, assume $V_F=0.6 \mathrm{~V}$. Calculate $V_{O L}, V_{O H}$, and $V_{I L}$ for this circuit. Sketch the transfer characteristics of the circuit.
Figure P14.37 can't copy

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Essentials of Electrical and Computer Engineering

Essentials of Electrical and Computer Engineering

David V. Kerns, Jr.,… 1st Edition

Chapter 14, Problem 37

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Step 1

The output is taken from the collector of Q3. The inputs are connected to the bases of Q1 and Q2, and the output is determined by the states of these inputs. Show more…

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Figure P14.37 shows a two-input TTL NAND gate. The transistors are identical with high betas, $V_{B E}=0.7 \mathrm{~V}$ and assume $V_{C E(S A T)}=$ $0.25 \mathrm{~V}$; for the diode, assume $V_F=0.6 \mathrm{~V}$. Calculate $V_{O L}, V_{O H}$, and $V_{I L}$ for this circuit. Sketch the transfer characteristics of the circuit. Figure P14.37 can't copy

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