CD40LG

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CD40LG

A gene on chromosome Xq26 that encodes of a protein expressed on the surface of T cells which regulates B-cell function by binding CD40 to the B-cell surface. CD40LG is critical for immunoglobulin class switching. 

Molecular pathology
A defect in CD40LG is associated with hyper IgM syndrome due to an inability to undergo class switch.
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The relationship between IMD3 and adjacent channel power ratio (ACPR) can be described as [17]-[23]
IMD3 (dBc) Gain (dB) Pout (dBm) PAE (%) Simulated data 29.
The rule of thumb is to refer the IMD3 to the reference plane that is away from the filtering.
1], the point X is shifted down causing the IMD3 line to shift to the right.
From Equation B-8, the input IMR can be used because the IMD3 is not filtered.
If IMD3 frequency = 2 * first tone frequency - second tone frequency
The IMD3 performance of the feedforward amplifier is improved by approximately 30 dB.
Typically, the higher the OIP3, the higher the obtained IMD3 performance.
The original IMD3 of the main amplifier is approximately -34 dBc and the IMD3 of the linearized amplifier is approximately -66 dBc.
In logarithm units, the power of an IMD3 signal varies linearly with a slope of +3 as long as the PA is operating below compression and assuming that cube law behavior is predominant for IMD3 products.
in]) curves of a signal fundamental and IMD3 signal approximate straight-line sections with a slope of+l and +3, respectively, before compression.
Contrary to IMD3, which depends on the given input power, IP3 characterizes PA nonlinearities by itself.