By David Wyatt, Mike Tooley
The plane Engineering ideas and perform sequence offers scholars, apprentices and training aerospace pros with the definitive assets to develop their plane engineering upkeep reviews and occupation.
This ebook presents an creation to the rules of airplane electronic and digital structures. it truly is written for a person pursuing a profession in plane upkeep engineering or a similar aerospace engineering self-discipline, and particularly should be appropriate for these learning for approved airplane upkeep engineer prestige as a part of an EASA or FAR-147 licensed direction or taking Aerospace Engineering City & Guilds modules, EDEXCEL nationwide devices, EDEXCEL larger nationwide devices or a level in airplane engineering.
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Extra resources for Aircraft Digital Electronic and Computer Systems: Principles, Operations, and Maintenance
10. This shows an 8-bit converter that uses a DAC (usually based on an R-2R ladder) together with a single operational amplifier comparator (IC1) and a successive approximation register (SAR). The 8-bit output from the SAR is applied to the DAC and to an 8bit output latch. A separate end of conversion (EOC) signal (not shown in Fig. 10) is generated to indicate that the conversion process is complete and the data is ready for use. When a start conversion (SC) signal is received, successive bits within the SAR are set and reset according to the output from the comparator.
4 The majority vote truth table Key Point Logic circuits involve signals that can only exist in one of two, mutually exclusive, states. These two states are usually denoted by 1 and 0, ‘on’ or ‘off’, ‘high’ and ‘low’, closed’ and ‘open’, etc. e. voltage levels used to represent the logic 1 and logic 0 states) logic circuits can be combined together in order to solve more complex logic functions. As an example, assume that a logic circuit is to be constructed that will produce a logic 1 output whenever two, or more, of its three inputs are at logic 1.
13. A bus that is self-clocking is referred to as: (a) universal (b) bidirectional (c) asynchronous. 14. The physical bus media specified in MILSTD-1773B is: (a) fiber optic (b) coaxial cable (c) shielded twisted pair. 15. The length of an ARINC 429 word is: (a) 16 bits (b) 20 bits (c) 32 bits. 7. The validity of an ARINC 429 data word is checked by using: (a) a parity bit (b) a checksum (c) multiple redundancy. 16. ARINC 573 is designed for use with: (a) INS (b) FDR (c) Weather radar. 8. The label field in an ARINC 429 data word consists of: (a) five bits (b) three bits (c) eight bits.