2 Analyze the lTL gate shown below by answering the followin

2. Analyze the lTL gate shown below by answering the following questions. 4k 1.6k INPUTS 1k (a) Let input voltages be low = 0 and HIGH +5 V. Make a table that states whether each of the transistors Qi through Q6 are ON or OFF for all for combinations of HI and LOW on the inputs A and B (b) From this table determine what logic function it represents (c) What current (approximately) flows in an input line when the input is HIGH? What (d) Without any load, the voltage when the output is HIGH is less than 5 volts. Explain (e) If, when the output was HIGH, the output current was 1.5 mA, what would the output current flows when the input is LOW? why this is true, and explain what voltage should appear at the output and why voltage be? Explain and/or show a calculation that supports your answer

Solution

it is a TTL totempole nand gate performing the operation of a nand.

a b output

0 0 1

0 1 1

1 0 1

1 1 0