5555555555
78. As a technician you are confronted with a TTL circuit board containing dozens of IC chips. You have taken several readings at numerous IC chips, but the readings are inconclusive because of their erratic nature. Of the possible faults listed, select the one that most probably is causing the problem.
(a) A defective IC chip that is drawing excessive current from the power supply
(b) A solar bridge between the inputs on the first IC chip on the board
(c) An open input on the first IC chip on the board
(d) A defective output IC chip that has an internal open to Vcc
| Subject Name : Electronics Engineering |
| Exam Name : IIT GATE, UPSC ESE, RRB, SSC, DMRC, NMRC, BSNL, DRDO, ISRO, BARC, NIELIT |
| Posts Name : Assistant Engineer, Management Trainee, Junior Engineer, Technical Assistant |
| Electronics & Communication Engineering Books |
| GATE 2023 Total Info | ENGG DIPLOMA | UGC NET Total Info |
| IES 2023 Total Info | PSUs 2022 Total Info | CSIR UGC NET Total Info |
| JAM 2023 Total Info | M TECH 2023 Total Info | RAILWAY 2022 Total Info |
Related Posts
555555555529. At saturation the value of VCE is nearly ________, and IC = ________. (a) zero, zero (b) VCC, IC(sat) (c) zero, I(sat) (d) VCC, zero- 5555555555122. What is the circuit number of the IC that contains four two-input AND gates in standard TTL? (a) 7402 (b) 7404 (c) 7408 (d) 7432
- 555555555550. How many flip-flops are in the 7475 IC? (a) 1 (b) 2 (c) 4 (d) 8
- 5555555555224. A principle regarding most IC decoders is that when the correct input is present, the related output will switch: (a) active-HIGH (b) to a high impedance (c) to an open (d) active-LOW
- 555555555597. The 7905 regulator IC provides ________. (a) 5 V (b) –5 V (c) 12 V (d) –12 V