Fiber / HF CommunicaTIons notes have been assigned alphanumeric numbers that disTInguish the subject matter contained in each note. The first four letters of each number define the category of the note, according to the following designation:
HFAN — Application Note
HFDN — Design Note
HFTA — Technical Article
HFRD — Reference Design
The application notes (HFAN) normally relate to the use of more that one group of parts and are not Maxim-part-specific. Numeric assignment is given based on the following categorization of subject matter:
HFAN 1 High Speed ​​Digital Interfaces
HFAN 2 Transmitter Interfacing
HFAN 3 Receiver Interfacing
HFAN 4 Jitter
HFAN 4.5 Measuring Jitter
HFAN 5 High-Speed ​​Measurements
HFAN 6 High-Speed ​​Signal Integrity
HFAN 7 HF Board Design
HFAN 8 Mechanical Assembly and Thermal Issues
HFAN 9 System
The design notes (HFDN) are related to a specific Maxim part (or family). Numbers are assigned consecutively as the notes are generated.
The technical article notes (HFTA) cover other general technical areas and are assigned consecutive numbers.
The reference design notes (HFRD) cover the use of multiple parts, assembled into a complete functional design (PCB) that offers a solution to a particular design need. Numbers are assigned consecutively as the notes are generated.
The main circuit of the equipment is the full bridge controlled circuit and the trigger circuit is the programmable integrated circuit. The phase-shifting, fixed width and modulation of the pulse are all digitized, and it does not need any adjustment for the section of the trigger. It has the features of high reliability, high pulse symmetry, strong anti-interference ability, quick reaction, as well as the advantages of no heat-generating, constant current, energy-saving which is compared with the discharge with the electrical resistance.
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