. The Bell System technical journal. Telecommunication; Electric engineering; Communication; Electronics; Science; Technology. DESIGN FACTORS OF THE 1553 TRIODE 525 Al-3, it will normally be constant for low power levels (for which the device is essentially linear) and equal to the low level power gain | F |'^ . However, at some higher power level non-linearities appear in some or all of the various short-circuit admittances, usually causing the power gain to decrease below the small-signal value by an amount called the com- pression, C. If Po/Pi be power gain for any power output and | F |- 0
. The Bell System technical journal. Telecommunication; Electric engineering; Communication; Electronics; Science; Technology. DESIGN FACTORS OF THE 1553 TRIODE 525 Al-3, it will normally be constant for low power levels (for which the device is essentially linear) and equal to the low level power gain | F |'^ . However, at some higher power level non-linearities appear in some or all of the various short-circuit admittances, usually causing the power gain to decrease below the small-signal value by an amount called the com- pression, C. If Po/Pi be power gain for any power output and | F |- 0 1 1 1 9 8 -^ ^ "" 7 10 12 14 16 POWER OUTPUT IN DBM Fig. Al-3.—Typical gain variation with power DC OUTPUT CURRENT Fig. Al-4.—Compression vs. Alternating current in output Direct current in output the small-signal power gain, the compression C is defined in decibels as follows: C = 10 logio = 10 logio 10 logio Po/Pi (Al-18) Pi Naturally, the compression depends upon how hard the tube is driven. It is therefore a function of the amount of drive, which may be con- veniently expressed in terms of the ratio of the alternating output cur- rent to the operating direct current, as in Fig. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original American Telephone and Telegraph Company. [Short Hills, N. J. , etc. , American Telephone and Telegraph Co. ]
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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1
