Page 123 - Electrical Engineering Dictionary

equation CCVT See coupling capacitor voltage
transformer.
n 1 n 2
X X
a ij T i+h,j+k = 0
CD Seecompactdisk, criticaldimension.
i=0 j=0
for h = 0, 1,... and k = 0, 1,... where CD See critical dimension.
a ij are coefficients of the 2-D characteristic
polynomial cd See candela.

z
I n 1 1 − A 1 −A 2 CD-I See compact disk-interactive.
det
z
−A 3 I n 2 2 − A 4
CD-ROM a read-only compact disk. See
n 1 n 2
X X i j
= a ij z z = 1 also compact disk.
1 2 a n 1 n 2
i=0 j=0
CDF Seecumulativedistributionfunction.
CB See Citizen’s band.
CDMA See code division multiple
CBE See chemical beam epitaxy. access.
CBR See constant bit rate. CdS abbreviation for cadmium sulfide,
a photoconductor with good visible light re-
CCD See charge-coupled device. sponse.
CCDmemory Seecharge-coupled-device CEL See contrast enhancement layer.
memory.
CELL See surface-emitting laser logic.
CCDF See complementary cumulative
distribution function. cell (1) in mobile radio communica-
tions, the area serviced by one base sta-
CCI See cochannel interference. tion. One way of categorizing the cells is
according to their size. Cell sizes may range
CCIR SeeInternationalRadioConsultative from a few meters to many hundred kilome-
Committee. ters. See also picocell, nanocell, nodal cell,
microcell, macro cell, large cell, megacell,
CCITT SeeComit´ eConsulatifInternational satellite cell.
T´ el´ egraphique et T´ el´ ephonique. (2) in ATM systems a small packet of fixed
length. The CCITT chose a cell size of 53-
CCITT two-dimensional a modified bytes comprising a 5-byte header and 48-byte
relative element address designate scheme. payload for their ATM network.
The position of each changing element on
the present line is coded with respect to the cell library a collection of simple logic
changing element on the reference line or the elements that have been designed in accor-
preceding changing element on the present dance with a specific set of design rules and
line. The reference line lies immediately fabrication processes. Interconnections of
above the present line. such logic elements are often used in semi-
custom design of more complex IC chips.
CCR See cochannel reuse ratio.
cell switching means of switching data
CCS See common channel signaling. among the ports (inputs and outputs) of a

c
2000 by CRC Press LLC