Yearly Archives: 2014

Wireless Receiver Sensitivity

Receiver sensitivity is defined as the minimum signal power (Pi,min) at which a receiver can detect a signal while providing an adequate SNR at analog receiver output (BER at digital receiver output). This is minimum detectable signal(MDS) power. In a multi-standard receiver, the sensitivity requirements vary depending on mode of […]

Resistive Terminated LNA

Well suited topology for broadband LNA design. Schematic of the LNA with resistive termination is shown in Figure 1(a). The resistive termination() at the input provides broadband impedance matching over a wide frequency band. The equivalent circuit of resistive termination LNA is shown in Figure 1c.   Gain of LNA, […]

Ampere’s Law

Ampere’s law relates the integrated magnetic field around a closed loop to the electric current passing through the surface of the loop.  It was first discovered  by André-Marie Ampère in 1826, later re-derived by Maxwell using hydrodynamics in 1861. Now it is one of the Maxwell equations, which is the […]

Equivalent Noise Bandwidth 1 comment

Equivalent noise bandwidth(ENBW) is defined as the bandwidth of a brickwall filter which produce same integrated noise power as that of an actual filter. This is also refered to as noise bandwidth or effective noise bandwidth. Given a filter with transfer function , the equivalent noise bandwidth () is defined […]