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In CB configuration emitter current is the input current and collector current is the output current.

Time hopping spread spectrum is more bandwidth efficient.

Direct sequence spread spectrum is more simpler to implement.

CMOS has PMOS and NMOS circuits. The devices are complementary: when input is high, the output is low and vice versa. Thus the device will act like an inverter.

Read and Write are the control signals in a RAM that allows data to be written into the memory and data to be written out from the memory.

Volatile means, those devices that can hold power as long as power is present. Once the power supply is removed, it loses its charge.RAM is highly volatile.
DRAM is volatile. It can hold power, as long as supply is present.

Basic equation of radiation is given by iL=Qv. i is the time change in current, l is the length of the current element, q is the charge v is the acceleration of the charge.
Antenna is radiates on the principle of resonance.
Resonance is the maximum standing current wave is observed along the antenna length.

The three patterns required are, ? component of the electric field as the function of the angles as ? and f, the f component of the electric field as the function of the angles ? and f, the phase of these fields as a functions of the angle f and ?

The beam width of an antenna measure at half of the maximum power received by an antenna or the 3 dB beam width of the antenna is termed as half null beam width.

The beam area is the solid angle through which all of the power radiated by the antenna would stream if P (?, f) maintained its maximum value over beam area and zero elsewhere. This value is approximately equal to the angles subtended by the half power points of the main lobe in the two principal planes

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