Active Passive RFID; Far Field; Near Field; RFID in libraries 1 Adaptive control 1 Adaptive filter 1 Adaptive filters 1 Asynchronous design; Digital circuits; Single-bit full adder; Dual-bit full adder; Ripple carry adder; Indication; Early output; Standard cells; CMOS 1 Automatic gain control 1 Beamformer 1 Closed-loop control 1 Constrained robot 1 Impedance control 1 Real-time systems 1 Speech enhancement 1 Variance estimation 1